区块链技术视频讲解,区块链入门书

区块链技术是一种新型的分布式数据存储和分布式计算技术，它具有不可篡改、安全可靠、高效可靠、透明可信等特点，日益受到广泛关注。本文将介绍区块链技术的基本概念，以及如何通过区块链技术来构建去中心化的应用系统。

首先，什么是区块链技术？区块链技术是一种基于密码学的分布式数据存储和分布式计算技术，它具有不可篡改、安全可靠、高效可靠、透明可信等特点，它可以用来存储和管理各种类型的数据，如货币、资产、文件等。

其次，区块链技术如何实现去中心化？区块链技术是一种去中心化的技术，它不需要一个中心化的服务器来存储数据，而是由多个节点组成的网络来存储数据，这些节点之间相互信任，不存在单点故障的问题，因此可以实现去中心化的数据存储和计算。

最后，如何使用区块链技术构建去中心化的应用系统？首先，需要使用区块链技术来构建一个分布式的数据库，用于存储应用系统的数据；其次，需要使用智能合约（Smart Contract）来定义应用系统的业务逻辑；最后，需要使用区块链技术来实现数据的安全可靠性，以及应用系统的可信性。

总之，区块链技术是一种具有不可篡改、安全可靠、高效可靠、透明可信等特点的分布式数据存储和分布式计算技术，可以用来构建去中心化的应用系统，实现安全可靠的数据存储和可信的应用系统。区块链技术的发展为社会带来了极大的变革，它将会改变我们的生活方式，促进社会的发展。

A. What is the reason and purpose of HNA Technology’s acquisition of Dangdang?

Tong Fu, chairman of HNA Technology, said that the company’s original business was relatively single, mainly shipping business, based on the shipping market The prosperity continues to decline significantly, and the traditional shipping industry is difficult to adapt to the development of the economic situation. Tong Fu said that the company is transforming into the technology industry represented by cloud computing, big data and artificial intelligence, and the acquisition of Dangdang will help further deepen the company's strategic transformation.

HNA Technology’s acquisition was valued at 7.5 billion Yu Yu and Li Guoqing quit management

Is the 7.5 billion valuation fair?

Looking back on this restructuring plan, April 11 HNA Technology announced that it plans to acquire 100% equity of Beijing Dangdang Kewen E-Commerce Co., Ltd. and Beijing Dangdang Information Technology Co., Ltd. at a price of 7.5 billion yuan through a share exchange + private placement. According to the plan, in the process of raising supporting funds, Tianjin Free Trade Zone Investment Holding Group Co., Ltd., which is controlled by Tianjin State-owned Assets, will subscribe for 1 billion yuan in supporting financing totaling 4.06 billion yuan.

In addition, the high debt issue of the target company has also attracted attention. The target company's total assets at the end of 2016 were 3.454 billion yuan, total liabilities were 3.788 billion yuan, and net assets were -334 million yuan; at the end of 2017, total assets were 4.010 billion yuan, total liabilities were 3.982 billion yuan, and net assets were 28 million yuan. As of December 31, 2017, the target company's total consolidated liabilities were 3.982 billion yuan, of which current liabilities were 3.948 billion yuan, and the asset-liability ratio was as high as approximately 99%. HNA Technology’s 2017 annual report shows that the company’s asset-liability ratio is 85.44%.

HNA Technology Financial Director Tian Lijun said that the company does not need to pay cash to complete this transaction. The cash consideration paid to Dangdang shareholders will be paid through no more than 100 companies including Tianjin Free Trade Zone Investment Holding Group Co., Ltd. 10 specific investors raised matching funds.

Building “China’s Amazon”

Data show that Dangdang’s revenue has continued to grow in recent years and its profits have increased significantly. Net profits in 2016 and 2017 were 132 million yuan and 359 million yuan respectively. Dangdang said that profit growth mainly depends on the increase in gross profit margin. On the one hand, Dangdang continues to improve the gross profit margin of book categories through cooperative publishing and reduction of procurement costs; on the other hand, Dangdang adjusts its department store business with low gross profit margin and large capital occupation, and the traffic is tilted towards high gross profit categories, and some categories are transferred to the investment platform. .

Ke Shengcan, CEO of HNA Technology, said that after the acquisition of Dangdang, the two parties can achieve complementary development in online and offline scenarios. Collaboration between the two parties can promote the user acquisition, activation, and conversion processes. Data shows that Dangdang’s registered users in 2017 have reached 230 million, with 4.38 million monthly active users. HNA serves more than 100 million C-end users every year. In addition, online and offline scenarios can provide application space for the development of the company's artificial intelligence, blockchain technology, cloud computing, and big data.

Ke Shengcan said that Dangdang onceKnown as the "Amazon of China", if HNA Technology finally successfully acquires Dangdang, the name "Amazon of China" will be even more worthy of its name.

The current controlling shareholders and actual controllers of Dangdang.com and Dangdang Kewen are Yu Yu and Li Guoqing. As of April 11, Yu Yu, Li Guoqing and their sons indirectly hold 93.26% of the shares of Dangdang.com. Yu Together, Yu and Li Guoqing directly hold 100% of the equity of Dangdang Kewen.

Yu Yu is the current chairman of Dangdang.com and the executive director of Dangdang Kewen. Li Guoqing is the current executive director of Dangdang.com and the supervisor of Dangdang Kewen. According to the announcement, Yu Yu and Li Guoqing will receive HNA Technology shares with a total consideration of 2.554 billion yuan and 1.095 billion yuan respectively in this transaction. After the transaction is completed, Yu Yu and Li Guoqing will directly hold a total of 16.49% of HNA Technology's shares.

Haitong Securities Senior Vice President Chen Chen said at the reorganization briefing that according to the reorganization plan, the target company became a subsidiary of the listed company, and the two founders, Yu Yu and Li Guoqing, no longer have control of the target company. "After the reorganization, Yu Yu and Li Guoqing plan to no longer serve as directors and senior managers of the company, and will gradually withdraw from actual business management at the company level, and will not participate in daily operation and management decisions at the company level."

B. Li Guoqing is a cup The biggest melon of the year was thrown. What was the first half of his life like?

C. Where to buy "Blockchain in Today's Era"

Taobao or Dangdang. According to relevant public information inquiries, "Blockchain in Today's Era" is a translated work, which is sold on Taobao or Dangdang.
1. Open Taobao or Dangdang.
2. Enter the website and search for "Blockchain in Today's Era".
3. Select and place an order.

D. What do you think of Li Guoqing going to Dangdang to take back the official seal and announce the "removal" of Yu Yu?

A scandal.

In a well-known company, the exposure of such internal strife at the top will have a great negative impact on the company and its employees.

E. How the e-commerce industry developed

E-commerce is a business activity that uses information network technology as a means and centers on commodity exchange; it can also be understood as a business activity on the Internet ( The activities of conducting transaction activities and related services through electronic transactions on the Internet), intranets (Intranets) and value-added networks (VANs, Value Added Networks) are the electronic, networked and informatized aspects of traditional business activities.
E-commerce usually refers to a wide range of commercial and trade activities around the world. In the open network environment of the Internet, based on browser/server application methods, buyers and sellers conduct various commercial activities without meeting to achieve consumer satisfaction. A new business operation model for online shopping, online transactions between merchants and online electronic payments, as well as various business activities, trading activities, financial activities and related comprehensive service activities.
At the same time, online marketing is alsoIt is a product of e-commerce, and for online marketing, it is necessary to make an online marketing plan before doing it, so as to facilitate the implementation of the plan.
E-commerce refers to commercial activities that use electronic means to engage in e-commerce. This is a broad concept of e-commerce. The e-commerce we usually refer to is the concept of online sales and online shopping in a narrow sense, that is, the business process of completing payment and ordering through the Internet.
E-commerce marketing: With the rapid development of the Internet, the value of online marketing has gradually been recognized and valued by business owners. In the Internet web1.0 era, commonly used online marketing include: search engine marketing, email marketing, instant messaging marketing, BBS marketing, viral marketing; but with the development of the Internet in the web2.0 era, network application services continue to increase, and online marketing The methods are becoming more and more abundant.
However, Internet marketing is defined from the perspective of operations management, focusing on how to sell products or services? E-commerce is defined from the business model and focuses on the systemic issues of the entire supply chain of the project. The two look at the problem from different angles and have different focuses. To sum up, e-commerce is a service and online marketing is a channel.

Development Phases
Phase 1
Email Phase. This stage can be considered as starting from the 1970s, when the average communication volume increased several times every year.
Second stage
Information release stage. Since 1995, information publishing systems represented by Web technology have grown explosively and become a major application of the Internet. How can small and medium-sized enterprises grasp the e-commerce era from "extensive" to "precision" marketing.
The third stage
EC (Electronic Commerce), the e-commerce stage. EC has just begun in the United States. The reason why EC is listed as an epoch-making thing is because the ultimate main commercial use of the Internet is e-commerce. At the same time, it can also be said conversely that business information in a few years will mainly be transmitted through the Internet. The Internet is about to become the nervous system of our commercial information society. At the fifth Asia-Pacific Economic Cooperation Informal Summit (APEC) held in Vancouver, Canada, at the end of 1997, U.S. President Clinton proposed a motion urging all countries to jointly promote the development of e-commerce. of information technology vendors have declared 1998 the year of e-commerce.
The fourth stage
Full e-commerce stage. With the emergence of the SaaS (Software as a Service) software service model, software has landed on the Internet one after another, extending the e-commerce chain and forming the latest "full e-commerce" concept model.
The fifth stage
The wisdom stage. In 2011, Internet information fragmented and cloud computing technology became more mature, and the active Internet marketing model emerged. i-Commerce (individual Commerce) followed the trend. E-commerce got rid of the current situation of traditional sales models and moved to the Internet, with active, interactive, and Conduct in-depth communication with users from multiple angles such as user care. Among them, ICE proposed by IZP Technology Group is the most representative.
E-commerce development trends
Broader environment: People are not limited by time, space, or many restrictions of traditional shopping, and can trade online anytime and anywhere.
Broader market: The world will become smaller online. A merchant can face consumers around the world, and a consumer can shop at any merchant around the world.
Faster circulation and low prices: E-commerce reduces the intermediate links in commodity circulation and saves a lot of expenses, thereby greatly reducing the cost of commodity circulation and transactions.
More in line with the requirements of the times: Nowadays, people are increasingly pursuing fashion, paying attention to individuality, and paying attention to the shopping environment. Online shopping can better reflect the personalized shopping process.

F. The reason why Dangdang chose Alipay

Alipay is a relatively safe third-party payment platform.
1. Alipay (China) Network Technology Co., Ltd. was established in 2004. It is a domestic third-party payment platform dedicated to providing "simple, safe, fast and convenient" payment solutions for enterprises and individuals. Since its establishment in 2004, Alipay has always regarded "trust" as the core of its products and services. It has two independent brands, "Alipay" and "Alipay Wallet". Since the second quarter of 2014, it has become the world's largest mobile payment manufacturer.
2. Alipay has established strategic partnerships with more than 180 banks at home and abroad, as well as international organizations such as VISA and MasterCard, becoming the most trusted partner of financial institutions in the field of electronic payment.
3. In February 2020, the Nepalese central bank issued a license to Alipay. In July, Alipay was selected into the list of outstanding blockchain solutions to combat the epidemic. In October, Alipay launched the “late payment” function. In December 2021, Alipay and China UnionPay realized mutual recognition of payment code scanning across the country.
4. Alipay provides free instant payment services to public welfare organizations. Taking the opening of online fundraising channels for the Wenchuan earthquake as an example, it includes more than 300 companies such as Project Hope, China Foundation for Poverty Alleviation, China Children and Teenagers' Foundation, and One Foundation. All public welfare institutions have access to Alipay, supporting more than 90% of China's public welfare online fundraising sites.
Extended information: Honor 50 4.0.2.193, Alipay 12.0.38.8200
Extended information:
Main functions
1. Support Yu'e Bao, financial management income can be viewed at any time;
2. Support various scenariosRelationships, group chat and group payment are more convenient;
3. Provide local life services, enjoy discounts on purchases;
4. Establish family accounts for children and parents;
5. Check Taobao bills and account balances anytime and anywhere , Logistics information;
6. Free long-distance inter-bank transfer, credit card repayment, recharge, and payment of water, electricity and gas bills;
7. Intelligent reminders for credit card repayment, payment, bill payment, phone bill recharge, and card and coupon information;
8 , Walking Donation, supports access to iPhone health data, you can walk and interact healthily with friends, and you can also participate in charity.
9. Ant Forest obtains energy through a specific method. The energy can grow into a tree. After growing up, a physical tree can be planted in a certain area in reality.

G. Can you recommend any books on blockchain?

There are more and more books in the field of blockchain, and many of them are The quality is actually not high. I recommend two better books that I have actually read and summarized.

A book is "Book Blockchain".

This book is characterized by using interesting and vivid comics to express some principles and applications of blockchain.

This book is especially suitable for newcomers who have just come into contact with blockchain, because the principles in it are analyzed using more real-life cases, which is relatively easy to understand and involves blockchain. Technical knowledge is relatively low.

And this book is not thick, so you can finish it quickly. After all, everyone is very busy at work now. If you read a very thick book, it is indeed difficult to read. This book happens to be more It is thin and light and can easily cultivate your interest in learning knowledge in the blockchain field.

WeChat public account: Shenzhen Blockchain Community

H. What technology is blockchain and what impact does it have on our lives and society< /p>

What is blockchain technology?

Before discussing how to apply blockchain in daily life, let us first talk about what blockchain is and how does it work?

Blockchain is an open distributed database, essentially a computer file used to store information (data).

Blockchain gets its name from its structural features: files are made up of blocks of data, each block is linked to the previous block, forming a chain, and each block contains data such as transaction records and A record of when the block was edited or created, the information (data) is timestamped, which is where the blockchain comes from.

Crucially, unlike centralized databases owned by companies or government agencies, blockchain is not controlled by any one person or entity and the data is fully replicated (distributed) across multiple computers .

Because it is a decentralized way of storing and accessing data, this makes it incredibly secure. Because unlike centralized databases, attackers do not have a single entry point, data security is more guaranteed.

In addition to the two major features of decentralization and security, the features that make blockchain a leading technology that distinguishes it from other technologies are:

Immutability: Once on the blockchain, no information can be changed, not even administrators can modify this information. It gives blockchain the advantage of being easily auditable.

Accessible: Information can be easily accessed by all nodes in the network.

No third parties: Blockchain facilitates peer-to-peer transactions, so whether you are trading or exchanging funds, there is no need for approval from a third party. Blockchain itself is a platform.

The impact of blockchain technology?

1. The open and non-tamperable attributes of blockchain technology provide the possibility for a decentralized trust mechanism and have the potential to change the financial infrastructure. Various financial assets, such as equity, bonds, Bills, warehouse receipts, fund shares, etc. can be integrated into the blockchain ledger and become digital assets on the chain, which can be stored, transferred, and traded on the blockchain. It has broad application prospects in the financial field. For example, it has typical applications in cross-border payments, insurance claims, securities transactions, bills, etc.

2. The current IoT ecosystem relies on a centralized network management architecture, and all devices are connected through cloud servers. As the scale of the network expands, the infrastructure and maintenance costs of centralized cloud servers, large servers and network equipment will incur high costs.

In the decentralized Internet of Things, blockchain is a framework that promotes transaction processing and collaboration between interacting devices. Each device on the network can serve as an independent, micro-business entity. run.

3. Public services are factors that promote economic growth and social progress. The supply of public services will have an important impact on various subjects and systems, culture, attitudes, behaviors, etc. in the process of political, economic, and social development. Influence. Traditional notarization relies on the government, but limited data dimensions and unestablished historical data information links often prevent governments and schools from obtaining complete and effective information. Blockchain can be used to create digital proofs that cannot be tampered with. New certification mechanisms can be established in the fields of digital copyright, intellectual property, certificates and public welfare to improve the management level of public services.

I. It can be seen that many e-books on the e-book platform are basically released simultaneously with paper books, even faster than JD.com and Dangdang. How can paper and electronic books be synchronized

Now Most of them are electronic versions, and few people write them by hand. There is an electronic version, which only needs to be typed before it can be put on the shelf and printed. You say it is faster than JD.com and Dangdang, but that means others get resources faster.