区块链mev是什么意思,var区块链

Ⅰ What are the three sets of metadata contained in the block header in blockchain technology

1. The hash value of the previous block. Used for pre-index blocks
2. Mining difficulty, random value (for proof of work calculation), timestamp
3. Merkel tree, which can summarize and quickly summarize the verification blocks The root data of all transaction data.

II What do big data, cloud computing, blockchain, and artificial intelligence have in common?

Big data (big data) refers to the inability to use conventional software tools within a certain time range The collection of data captured, managed, and processed is a massive, high-growth, and diverse information asset that requires new processing models to have stronger decision-making power, insight discovery, and process optimization capabilities. The 5V characteristics of big data (proposed by IBM): Volume (large amount), Velocity (high speed), Variety (diversity), Value (low value density), Veracity (authenticity), the platform has hadoop

Ⅲ Explaining blockchain in vernacular

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Recently, various countries have been blocked in China This is an ICO financial scam, but it does not hinder the vigorous development of blockchain technology. After all, technology is innocent and can bring benefits to people. As for how to use it, it depends on people to operate it. If the operation is good, you can recommend development. If the operation is not good, it is like the major ICO projects. Find some knowledge for Internet celebrities to conduct so-called illegal fund-raising and financial fraud.

After talking for a long time, what is blockchain? When it comes to blockchain, the first thing that comes to mind for many people is Bitcoin. We need to solve a problem. Bitcoin is a blockchain, but blockchain is not Bitcoin. Simply put, blockchain is distributed ledger technology (DLT), not a token. It has many characteristics, such as decentralization, traceability, and difficulty in tampering.

(1) Blockchain is a distributed database

First of all, this is a decentralized distributed architecture system. Therefore, having only one central server or node is not called a blockchain. For example, if you go to Taobao to buy a mobile phone, you and the seller are strangers and have no basis for trust. If you give the money to the seller first, the seller may block you by not delivering the goods, and then your mobile phone money will be gone. If the seller ships first, do you pay? It is possible that you do not pay the seller after receiving the goods, and one party may lose money anyway. At this time, a third-party guarantee is needed to solve the trust problem. Just like Alipay now, you give money to Alipay and the seller will deliver the goods. When you receive the goods, the seller will receive the money.

The above example is a centralized system because all guarantee work is handled by Bora, a third-party payment company. Suppose one day Alipay wants to tamper with data, neither the buyer nor the seller can do anything, because allThe authority is all in the hands of one company.

At this time, a distributed database is needed. This third party is no longer Alipay, but thousands of monitors. When you buy a mobile phone on Taobao, you will shout to everyone that I am going to XXX to buy a mobile phone, and I paid XXX yuan. The other person will yell like everyone else. I collected XXX’s mobile phone bill and sent it over. In this way, everyone knows about this transaction and everyone is recording this transaction, so it is useless if one or two nodes have problems or malicious behavior, because most nodes have recorded this matter.

(B) Blockchain uses encryption technology to ensure data security

There are two important points here: 1. Crypto-enabled hash function 2. Asymmetric encryption.

If you are interested in specific concepts, you can go online, but people without basic knowledge may not be able to understand it, because these two points are too professional. In fact, if you only know the use of blockchain, you don’t need to have an in-depth understanding of it. It is also a technical concept. All you need to know is that blockchain relies on these technical points to ensure data security and is not easily tampered with. Of course, many people say that these two points can guarantee 100% non-tampering. I want to be a little conservative here. As an author who works in the security industry, I have always been skeptical about 100% security, so it may be more appropriate to call it difficult to be tampered with.

I will briefly introduce these two concepts and try to explain them clearly in plain English.

1. Cryptographic Hash Function

This is mainly used to verify the integrity of information. For example, I sent a message to the company leader saying that I was sick on Friday and needed to take a day off. At this time, a hash value will be generated based on the message I sent, such as: 123456. At this point, when the leader receives this message, a hash value is also generated. Because the content of the message I sent has not changed (it has not been tampered with), the hash value remains unchanged, still: 123456. This is if someone wants to tamper with this news and get sick on Friday and need to take a year off. At this time, the hash value will change, such as: 123489. That's when we learned our information had been tampered with.

2. Asymmetric encryption

It is mainly used for information encryption and authentication. It is actually two keys, one is called the public key and the other is called the private key. Public key encryption, private key decryption.

A public key is a key that everyone has. You own it, I own it. We can all encrypt with this key, but when decrypting it must be decrypted with my private key. If you don't have my private key, you can't decrypt it.

(C) The blockchain uses a consensus algorithm to reach consensus on new data.

The role of the consensus algorithm is to enable all nodes to reach a consensus on the new block. In other words, everyone must approve the new block.

For a centralized deployment system, this is simple, everything is controlled by the center, but in the distributed system of the blockchain, it is very complicated. For example, there are three nodes. A said he bought a mobile phone from XXX store and paid for it, B said he didn’t pay, and C said he didn’t pay enough. Then who do you listen to? What's more, blockchain technology is not as simple as three nodes, but a huge distributed system.

This is when a solution is needed. There is a corresponding problem in computer science called the "Byzantine Universal Problem" or "Byzantine Fault Tolerance" (BFT). This question was raised not because of Bitcoin, but because of a special background.

Early aircraft had three independent control systems. Why do we need three independent control systems? For example, in an emergency, there is a plane opposite. How to judge whether you should hide? If there is only one system, there is no choice, which is equivalent to centralized deployment. If the system breaks, you're dead. What if one of the two systems breaks? The good ones are said to hide, and the bad ones are said not to hide. The computer cannot judge the final result. Therefore, three independent systems are needed to support it, and the probability of two total failures is still very small. But this only takes into account injuries. What should I do if there is a malicious system? Is three enough? The answer is no, we need four systems to maintain consensus.

The use of blockchain is similar, because it is supported by a huge number of nodes, and each node is an independent system without interfering with each other. We can assume that the number of failed nodes and malicious nodes is limited, so it will not cause abnormal consistency of data.

Related questions and answers: What is blockchain? What is the use?

Blockchain is a new computing paradigm and distributed infrastructure that uses fast chain data structures, distributed node consensus algorithms, cryptography and smart contracts based on automated script code to produce, verify, store and transmit data. It can also be said that blockchain is a distributed ledger technology that can provide a decentralized trust mechanism in a non-trust environment, allowing multi-party participants to conduct secure and trust-based transactions without intermediaries.

The core advantage of blockchain technology is decentralization. It can realize decentralized credit-based transactions in a distributed system where nodes do not need to trust each other by using data encryption, timestamps, distributed consensus and economic incentives. Point-to-point transactions, coordination and collaboration provide solutions to the common problems of high cost, low efficiency and insecure data storage in centralized institutions.

The fields of use of blockchain include digital currency, certificates, finance, anti-counterfeiting and traceability, privacy protection, supply chain, entertainment, etc. With the popularity of blockchain and Bitcoin, many related top domain names have been registered. It has had a relatively large impact on the domain name industry.

Related Q&A: Can you explain to me what a blockchain is in an easy-to-understand way?

Er Gazi is my friend since we were young, and we were naked in Hegou together. Later, I came to the city to study and work, and lived a life as a drifter in the north; he farmed at home and did some small business, and now he has a son and a daughter, and his life is safe. He envied my so-called "seen the world", and I envied his simple life without the pressure of mortgage loans. We have completely different and mutually enviable lives??

That day, Gazi came to me on WeChat and asked "District" What is a blockchain?" I was stunned for a moment, how could this idiot care about such an avant-garde word? I pretended to be calm and prepared to talk about the technical principles bit by bit, but I could see the confused expression of that idiot through the screen of my mobile phone. what to doHow can I explain clearly "what is blockchain" to someone with a little bit of Internet concept and technical foundation? This seems to be a very thorny issue??

The village commissary interprets the core of blockchain (picture quoted from the Internet)

Zone The core essence of the blockchain is "decentralization", and almost all operating modes of the blockchain operate around the concept of "decentralization". Once you understand what "decentralization" is, you can basically explain the question "what is a blockchain?" For Erga, of course, he must perform a version that he can understand.

“I said, Gazi, are you still open that canteen at the east end of the village?” Gazi answered yes. I decided to use this canteen as an example to explain the actual use of blockchain in modern business and financial models. Scenario, so that he can better understand what blockchain is.

"Are there still many villagers who take credit now? By the end of the year, some of the accounts cannot be remembered clearly, and there are still many defaulters or those who refuse to accept their accounts?" At this point, Ergazi got emotional and kept complaining. Nowadays, people's hearts are not as old as before, and business is difficult to do!

"In the past, the operation model of your canteen was a typical centralized one. You granted credit to the villagers and allowed them to take accounts on credit. All accounting was done directly through you and our villagers. You were the center of all accounting affairs." Ergazi said I understand, let me continue.

I said: "If you fail one day, then all the accounts will become dead debts? It will be difficult to get back the IOUs written in black and white, let alone those who remember the accounts verbally, but the block The decentralization of the chain can solve this problem very well. As long as the earth still exists, the blockchain will remember that every account will exist forever." Erga became more energetic after hearing this.

The essence of blockchain is “decentralization”

“The essence of blockchain is decentralization. Once someone takes credit from you, all the neighbors in the village will help you keep accounts. Because of the accounting There are many nodes, and it is neither easy to make mistakes nor others to default on the debt, so everyone reaches a consensus. If someone maliciously fails to pay back the debt, the whole village will know his character, and no one will be willing to have financial transactions with him in the future? ?”

At this point, Gazi was obviously a little excited. It seemed that he was really worried about the credit issue. Seeing that Gazi was interested, I felt a little sense of accomplishment and continued: "Of course, the above is just an analogy. In fact, the blockchain does not really allow the villagers to get paper and pen to help you keep accounts, but through the Internet It was completed by networking with the computer."

At this time, Gazi was a little confused and asked: "Then everyone in the village knows what others bought from me, so who would buy anything from me? It's really a bit weird. There is no privacy. And you don’t have time to keep accounts here. Last year’s accounts are said to be this year’s. What if you keep delaying it?”

“Okay, Gazi, you are on to the point of asking this question.” It seems that Gazi is not stupid at all, and is still very smart in doing business. I continued to explain: "So, the recording and transmission of this information are all done through encryption. What you see is a string of numbers and English, and each account has a timestamp to record the time it occurred. , can’t rely on itof. "

Gazi had another question: "Is it possible that the people who owe the debt have a good relationship with the villagers, and they join forces to tamper with the accounting? Then you won’t be able to explain clearly at that time??”

“Gazi, that’s all you have, haha. "I understood Gazi's concerns and continued to explain: "The mechanism of the blockchain requires more than 51% of people to agree to tamper with a bill. Everyone has a degree of closeness and distance between them, and it is impossible for everyone to favor the same person. If it were a computer, more than half of the computers on the entire network would need to recalculate. This project would be so huge that it would be almost impossible to complete??"

In this way, through the actual situation of the canteen and combined with some scenes in life, Gazi understood What is in the blockchain: decentralization, distributed accounting, consensus mechanism, encryption mechanism, timestamp, and the characteristics of being difficult to tamper with.

Ergazi was silent for a moment, seeming to be digesting the example I just gave him. I don’t know how much he can understand the example. Not long after, he sent me a voice message on WeChat: “What does blockchain mean? In the past, when I bought goods online and paid, I had to go through Jack Ma’s house. If there is a blockchain, can we directly trade with the seller? Anyway, the accounting is very safe. "

"Okay, Gazi, it's really clear at first glance. Blockchain is essentially a decentralized distributed ledger data cloud. Of course, it can be understood according to your understanding. "I'm very happy that Gazi can roughly appreciate the true charm of the blockchain. Fortunately, my words have not been in vain.

What is Bitcoin? (Picture quoted from the Internet)

"Then Bitcoin What is this thing again? What does it have to do with blockchain? "Gazi asked.

I thought about it briefly and decided to continue to explain to Gazi with the story of the canteen: "In your canteen, the villagers can't keep accounts for you for free all day long. Do you have to carry some during the holidays? This is the reward mechanism of the blockchain, and everyone who participates in bookkeeping may receive rewards. "

"Then what are the rewards based on? There has to be a rule, right? "Gazi asked very puzzled.

I explained: "Zhang San went to your store to borrow a pack of cigarettes on credit, but Li Si knew about it first and helped you keep an account first, and then other people knew about it. Keep accounts, then Li Si will be able to get a small red flower as a reward ~ This small red flower is generated by the blockchain system and has no value in itself, so you do not need to pay any cost for this small red flower??"< p>“Can Bitcoin be spent as money? How is it different from the banknotes we usually spend? "Gazi continued to ask.

"Bitcoin is a digital encrypted virtual currency. In principle, it has no value itself like our banknotes. However, banknotes have a credit guarantee from the state, so they have value. Bitcoin is the value formed by consensus among Bitcoin network users, and it has tradable properties, so it can be used to carry value. "What is said here is a bit profound. I don't know if Gazi can understand it.

I continued to explain: "Banknotes can be printed infinitely. If more are printed, inflation will occur. When we were young,Popsicles costing 1 cent are good, but now you can’t eat them for 1 yuan. Of course, there are many factors that affect inflation. The number of Bitcoins is fixed, and there is no possibility of unlimited over-issuance. However, different people have different judgments on their value, and coupled with the influence of supply and demand and investor sentiment, their prices are always fluctuating. ”

What is the difference between Bitcoin price fluctuations and stocks?

“So is speculating in Bitcoin just like speculating in stocks? Can you understand it this way? "Gazi seems to know a lot.

"In fact, there are some similarities, but there are also big differences. "I continued Gazi's topic: "The price of stocks always fluctuates around the valuation of companies, and there is government supervision in the stock market. Bitcoin itself has no value. It is priced entirely based on supply and demand and player valuations. It grows wildly without any government supervision. Therefore, it may have higher risks and higher returns than stocks. "

In the end, Gazi revealed the real purpose of today. He asked me: "Can I invest in blockchain projects? ”

Gazi is a typical example of those who don’t go to the Three Treasures Hall for anything. Although there is a large circle of people who are involved in both blockchain and Bitcoin, in fact, what he really cares about is “blockchain project investment” Is it reliable? "When these words came out, I was extremely shocked. Now the so-called blockchain investment projects have actually reached fourth- and sixth-tier cities and small towns!

As of now, there are only three types of blockchain investments. Situation: Mining, currency speculation, so-called blockchain projects.

Mining and currency speculation are still the main lines of the blockchain (pictures quoted from the Internet)

The so-called mining means mining by purchasing mining machines, etc. Equipment, mine virtual currency, and then sell and realize it to get returns. You can install the mining machine yourself, or you can find a mining pool to host it, but the core keys to profitability are "computing power" and "power consumption" as well as Investment in equipment. With the sharp drop in the price of virtual currencies and the increase in mining difficulty, the current mining returns of many currencies are very unsatisfactory. Mining is obviously only a very small number of investors who understand technology can play successfully. I My childhood friend Gazi obviously can’t play with it.

As for “coin speculation”, I have just introduced some differences between Bitcoin and stocks in the previous section. In principle, although they are both “buy low and sell high” operations , but there is a huge difference. Ordinary investors cannot determine the value of a virtual currency itself, and the price is determined entirely by the relationship between supply and demand, which is somewhat similar to what we often call "market makers." On the other hand, the virtual currency trading market is extremely Irregularities, theft and hacker attacks often occur, and the risk factor is much greater than investing in stocks. For the safety of my friends' funds, I am one of the ten thousand people who disagrees with "coin speculation"!

"September 4th" It is illegal to issue virtual currencies

In fact, in my opinion, most of the so-called investment projects in the market are essentially "illegal fund-raising" and "pyramid schemes." Some so-called blockchain investment projects use various Packaging and encouraging words attract investors into the circle, and then create the illusion of profitability by building a software and hardware ecosystem of new currency issuance + mining + currency speculation., and then eventually ran away. Our country's laws clearly stipulate that the issuance of virtual currencies is illegal.

Illegal pyramid schemes now wear the cloak of blockchain (picture quoted from the Internet)

And how to identify some pyramid schemes under the guise of blockchain? In fact, these pyramid schemes are also so-called Ponzi schemes, what we people often call "empty gloves." These so-called "direct sales" or "marketing" activities often have no actual products to circulate, and rely more on developing "downline" to ensure top-level profits. With the rise of the concept of blockchain, this MLM model has shown an intensification trend, and it even deceives people under the banner of state support for new technologies.

When Gazi asked, “Can blockchain projects be invested in?”, I realized the seriousness of the problem. Gazi is a typical young man from a small town, and his pursuit is his wife and children. But when faced with the attraction of "wealth", people often do inappropriate things. Mining and currency speculation are simply not suitable for him, let alone blockchain investment projects that are most likely "illegal financing" or "illegal pyramid schemes"!

I quickly called Gazi and conducted the above analysis carefully??

IV What is the value of decentralization in blockchain technology

金Wowo Network analyzes the value of decentralization as follows:
(1) Fault tolerance: Once there is a problem with the centralization, other nodes will easily collapse across the board. A centralized system is less likely to have accidents because it relies on other nodes, and other nodes are unlikely to have problems at the same time.

(2) Attack resistance: A decentralized system will make it more expensive to be attacked because it lacks a sensitive central point, and the central point is more susceptible to low-cost attacks. Everyone should know that attacking the center may completely collapse. This is why more and more investors hope that decentralized technology will become more mature.

(3) Anti-collusion: It is difficult for participants in a decentralized system to conspire to benefit themselves at the expense of other participants.

IV is equivalent to a transaction record in the blockchain. How can everyone remember it? Every new block will create a problem and why?

Let me explain it based on the Bitcoin network:

A node generates a After the transaction, the transaction will be broadcast. Each node will collect transaction information on the network, and after reaching a certain amount, these transactions will be packaged into a block.

The Bitcoin network is designed with a proof-of-work mechanism. A mathematical problem is designed (violent calculation of hash value, so that the calculated hash value meets a certain difficulty, which is actually calculating a field value nonce in the block header). The first calculated node broadcasts the block to other networks. Verifying whether the block is satisfied by the nodes in it is the answer to this puzzle. If so, add this node to the end of your own blockchain.

By broadcasting, let everyone take note. So if youDownload bitcore's Bitcoin client and become a node on the Bitcoin network. It will initially allow you to synchronize 120G (currently) Bitcoin block information.

Each new block is generated by miners through a large number of mathematical operations, so that the calculated mathematical results meet a certain mathematical difficulty. Therefore, Bitcoin network mining is to continuously form blocks into chains. The mining reward Bitcoin is an incentive mechanism that motivates miners to mine.

VI What is big data and real estate evaluation practice

Big data, simply understood, means massive data. In the era of big data, data is generated all over the world at any time, and any tiny Data can quickly generate incredible value. Big data has four characteristics: large data volume (Volume), the data in big data is not randomly collected samples, but contains all data; diverse data types (Variety), the type of data is not only in text form, There are also various forms of data such as pictures, videos, audios, and geographical locations. As people’s requirements for information become higher and higher, the proportion of personalized data becomes more and more important; the processing speed (Velocity) is fast, and it follows the "1 "Second Law", that is, quickly obtain value information from various types of data ocean; value density is low (Value). Although the amount of data is huge, the value obtained from it is not proportional to the volume of data. These are the 4 basic characteristics of big data, or big data 4V for short. In the era of information explosion, with the advantages of big data, we can quickly obtain high-value information from massive data in various forms.

In recent years, my country’s policies have continued to promote the development of the big data industry, and its application has penetrated into all aspects of national life, covering finance, e-commerce, medical health, automobile transportation, culture and entertainment, games, and sports. Fitness, education and training, agriculture, real estate and home furnishing and other industries. By quickly analyzing and processing the massive data collected, more high-value information can be obtained.

2 Application of big data in real estate registration and real estate transactions

In real estate registration and real estate transactions, the results obtained by sorting and summarizing big data also provide All kinds of high-value information. Through the transaction contracts, household registers, marriage certificates, house ownership certificates, parcel maps, household plans and other information that appear in the real estate registration and online signature filing business, we can analyze the commercial housing sales area, average commercial housing sales price, and purchase area distribution in the region. Data such as the transaction area of ​​existing housing, average sales price of existing housing, and the nature of home buyers are recorded and statistically analyzed. Based on the analysis of various indicators, the supply rate of commercial housing in the region, real estate transaction status, changes in population size, etc. can be further analyzed using objective data. It provides a valuable reference for scientific analysis of the current situation and future trends.

In practical applications, based on real estate transaction online signing data, data on the sources of home buyers can be collected. From data on home buyers in other places, we can learn about home buyers inside and outside the province.The population ratio can be analyzed to analyze the city's attractiveness to the population, which can be related to the city's planning, economic development, settlement conditions, policies and regulations, etc. Take Figure 1 as an example of the population of home buyers in a western province. The largest number of non-provincial home buyers in this province come from neighboring provinces. Through analysis, it can be concluded that the urban planning and economic development of this province are weaker than those of southern cities, and have a negative impact on the national population. It is not very attractive, but due to the cooperation between the province and neighboring provinces in recent years, it has a strong attraction to surrounding provinces, allowing people from surrounding provinces to come for development and investment.

Figure 1: Proportion of out-of-province home purchases in a western province



3 Complete data valueization more comprehensively and in-depth
< br />The value brought by big data is far from that. Faced with different subjects and different needs, when used in conjunction with other technologies, the value it can bring is far beyond our imagination. For example, artificial intelligence and blockchain technology are integrated with big data, and machines are used to make the data collection and analysis process faster and more comprehensive, so that more high-value information can be discovered more quickly.

3.1 In-depth exploration of the value of real estate registration and real estate transaction big data in government affairs

The development of artificial intelligence is closely related to data. Machines trained with big data can identify Capabilities are not limited to the obvious data. Adding artificial intelligence to big data can increase the breadth of data utilization. Big data is divided into structured data, unstructured data and semi-structured data. With the rapid development of computer networks, digital media and database technology, unstructured data and semi-structured data have increased dramatically. Faced with such a huge amount of unstructured data, the scattered, alienated, original and disordered data can be efficiently integrated and processed through big data and artificial intelligence technology to form an ordered data system. Then use artificial intelligence analysis to obtain objective results, gain more valuable insights, and provide basis materials for decision-making.

At the same time, through blockchain technology, the data analyzed and processed by big data and artificial intelligence can be shared on the chain, which can curb information islands and duplication of construction and improve efficiency. In real estate registration, artificial intelligence technology is used to intelligently identify transaction contract images, document images or transaction contract signatures and seals in the online signing process, effectively driving the overall operation of government services, collecting relevant data, and then registering them through blockchain technology. The verified ownership certificates are shared on the chain to realize information sharing and connection within the department. Big data integrates, monitors, and analyzes various data to obtain more comprehensive analysis results, as shown in Figure 2.

Figure 2: Big data + artificial intelligence + blockchain



Uploading relevant data to the chain can not only target a single department Information series can also promote cross-department collaborative development. Each department serves as an alliance node in the blockchain, thereby realizing cross-department information sharing. For example, the real estate registration certificate is on the chain, the public security department uses the blockchain to query real estate information when handling household registration affairs. When understanding the development status of a city, relevant value information such as urban population, real estate supply and demand, etc. can be obtained through the associated data obtained from big data + artificial intelligence + blockchain technology.

3.2 ​​Stimulate the value of big data in real estate registration and real estate transactions in business

The author believes that the value of big data is not limited to government affairs, but also plays a lot of role in business. important role.

3.2.1 Real Estate Project Research

For real estate developers, in order to better meet the needs of customer groups, it is necessary to conduct in-depth and comprehensive market research before project development and construction. Conduct research to accurately grasp customer needs and establish project positioning. Usually real estate research is carried out in three major sections: first, regional environment analysis, including regional economic development status, policies and regulations, regional development, regional supply and demand conditions, commercial facilities, bus lines, natural environment, etc.; second, competitive project analysis, including The apartment types and ratios of competing products, sales prices, payment methods, community surroundings, geographical location, etc.; the third is a survey of home buyers’ needs, including home buyers’ purpose of purchasing a home, buyers’ psychology of purchasing a home, factors that buyers pay attention to when choosing a property, and home purchase Factors that investors pay attention to when choosing a house type. In the actual research process, the home buyer demand survey, that is, the customer's true intention data, is a reference part that developers cannot ignore.

For example, in the construction of TOD projects in recent years (a "public transportation"-oriented development model), since the beginning of urbanization, people have attached great importance to efficiency and quality, which is reflected in their lives: in life Within a radius of about 800 meters from the center point, a "micro-city" integrating work, residence, commerce, education, etc. is formed, with convenient transportation to meet basic needs in work and life. However, these data are not comprehensive enough based on real estate transaction government data. It is necessary to refer to relevant intention data on the Internet, combine Internet intention data with objective government data, and analyze and obtain undistorted data. This will provide reference data for future real estate TOD project planning, the specific geographical location of the project, home buyers, surrounding businesses, educational resources, cultural construction, sales prices, etc.

3.2.2 Precision Marketing-User Portraits

Enterprise resources, manpower, material resources, funds, etc. are all limited. Analyze and draw user portraits to choose goals that suit you. market, focusing resources, manpower, material resources, and funds on target customers, accurately reaching the real estate needs of the target market, and improving the economic benefits of the enterprise.

In the real estate market, from the perspective of real estate agencies, the needs of target customers are mainly determined by their social and economic background. In the process of precision marketing, targeted three-dimensional data can greatly narrow the scope of target customers, specify users, and capture target customer groups more efficiently. At the same time, it can also make reasonable suggestions to buyers and sellers, improve the threeParty’s trust and closing rate.

Take real estate transactions around the CBD business district as an example. Government affairs data can help real estate agents understand the surrounding housing transactions, that is, transaction price, house area, house type, etc. However, these only provide basic data for precision marketing, and there is less high-value data for target customers, and this part of the data has strong subjective awareness. For example, it is a must to buy a house surrounded by large supermarkets and pet hospitals. Cinemas and arcades are indispensable. It is necessary to understand and collect the dynamic intentions related to business people on the Internet, and to understand the target customers' consumption habits, living conditions, and even occupation, age and other information from aspects of clothing, food, housing and transportation. With this data, real estate agents can target their target customers, accurately push advertisements, and provide corresponding services. At the same time, we can suggest a reasonable house price range to the seller based on the online transaction price.

3.2.3 Real Estate Finance

Take mortgage loans as an example. When banks apply for commercial housing development loans, they need to consider whether the borrower and the loan project meet the corresponding conditions and whether Comply with relevant regulations. Among them, banks need a detailed project situation when considering a loan project, including project development status, feasibility report, five development project certificates, project overall plan, project renderings, photos of recent project construction, promotional materials, and promotion plans. etc., to show the bank the good prospects of the project. Only after the bank's assessment determines that the project is stable and reliable can the follow-up process be carried out.

But no one can be completely sure about the future development of the project. Only clear data can help predict future development. The author believes that in real estate finance, the Internet + government data can also be used to understand the current development situation around the project through government data, plus the intention data about the project surrounding the Internet. After the two are combined, a more three-dimensional data can be used For example, the development project introduction materials include registration data of other commercial houses for sale in the project area, data on the Internet for housing, transportation, life and other related search information in the area, etc., to help banks consider and predict the future prospects of loan projects. Prospects.

4 Conclusion

The value brought by big data is far more than what we see in front of us. By correlating the information obtained from big data with other industries, it can also bring More unexpected value. For example, three-dimensional real estate data can be connected with education and training to achieve balanced development of educational resources, real estate and automobile traffic data can be linked, and effective measures can be taken to alleviate traffic pressure. It can be seen that the value that big data can bring to real estate registration and real estate transactions can also be deeply explored, breaking the original value boundaries, obtaining high-value and forward-looking information, and making future planning more rational.