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A. How to choose an excellent blockchain trading platform developer

We are concerned about the rise of blockchain trading platforms and can observe it from several aspects:

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1. Check the background of the developer: including registration, and compare it with other existing products and trading systems of the Xingun developer to see if they have the same system architecture and avoid exchanges that are trying to sell dog meat.

2. Whether the server memory is powerful;

3. Check whether the entire trading system is completed within the system

B. What are the good ones in China currently? Blockchain application development platform

Whenever Dilemma Hong mentioned decentralized application platforms before, we always thought of foreign blockchain solutions, but when we talk about this topic today, we think more of ourselves. Domestic Laikelib

The underlying architecture of Heshu Laikelib blockchain technology under Shanghai Heshu Software is a decentralized blockchain application development platform, which aims to help developers quickly create decentralized application

Laikelib is easy to use, flexible, convenient and safe

From a model perspective, it is similar to Ethereum and is a blockchain underlying technology architecture service, but the implementation mechanism is still Slightly different, this can be learned on the official website of Heshu Blockchain Technology

C. Yunnan Province Blockchain Electronic Invoice Operation Guide

In order to implement the State Administration of Taxation’s "Decentralization, Delegation, Delegation, Delegation, Delegation, Delegation, Regulation and Service "The series of work arrangements for the reform are to implement the requirements of the Provincial Party Committee and the Provincial Government on the construction of "Digital Yunnan". The Yunnan Provincial Taxation Bureau is vigorously carrying out district-level taxation based on "one platform, one industry, one town, two industries, and two types of tickets". Blockchain electronic invoice promotion work. Today let’s learn the operation of blockchain electronic invoices! Part 1 Blockchain Merchant Platform Invoicing Initialization Preparation Registration Log in to Yunnan Blockchain Merchant Platform yunnan-cloud.wetax.com.cn, submit relevant registration information, and complete registration . Please complete the application at the Yunnan Tax Bureau before registering on the merchant platform. To log in, merchants use the tax ID or mobile phone number they filled in when registering on the platform. After entering the login page, they must first sign the contract. After successful signing, they can start using it. Contract Signing Users who log in to the merchant platform for the first time need to complete the contract signing and enter the merchant platform after signing. Just confirm the signature, and you can start using it after the signature is successful. Maintenance and maintenance of invoicing equipment operation path: equipment coding - invoicing equipment - binding Yunnan blockchain electronic invoice Note: If it is not registered with the tax bureau, an error will be returned. Please confirm that you have completed the blockchain merchant registration application with the tax bureau. The operation path of maintaining product codes is: equipment code - product code - new product code - tax product code - enter the name to search. By searching for the product code name, you can quickly find the corresponding code, and selecting it will automatically bring out the product number, tax rate and other information. Check "Default billing items" to "Yes" and click "Add". Note: Select here what you should enjoyPreferential tax rate. Store management operation path: Group management - store management - check the store number - download the QR code - print the counter card - place the cashier for consumers to scan the code and issue invoices. After scanning the code, consumers can choose to pay for invoicing or review the invoicing method, and invoice That is sent to the consumer's email address. (Be sure to pay attention at this time: check whether the tax plate number is displayed and whether the status is enabled. If these two conditions are not met, invoicing cannot be issued) Download the store invoicing QR code to activate the payment function. Before downloading the store invoicing QR code, you need to activate it. Payment function (currently, you can choose whether to activate this function according to your needs). Finally: after all the above operations are completed, the invoice can be issued and the authenticity can be verified. Part 2 Invoicing Management Manual Filling Here is the manual filling page. After selecting the invoicing type and tax plate (the blockchain merchant identification is displayed as "tax plate number" in the system), you can enter the header and issue the invoice. Scan the QR code to issue an invoice. Consumers scan the QR code to issue an invoice (the QR code here is the store invoicing QR code downloaded in the store management function). Operation path: Open WeChat—scan the consumer to fill in the consumer amount and fill in the header information and click "Pay and invoice" or just "Submit for invoicing". After submitting the invoice, enter the submission success page, click Finish, and enter the invoice list page, where you can see the status and details of the invoice you just applied for. After consumers submit the invoicing application by scanning the invoicing QR code at the front desk of the store, the merchant can review the invoice-related information on the computer webpage. The corresponding invoices can be screened based on header type, invoice type, review status, etc. Review. Only after passing the review will the invoicing be successful. Operation path: Invoicing management - Invoicing review - After the review is passed, the electronic invoice can be generated in the "District Ticket Assistant" on consumer WeChat. It takes less than 3 minutes from filling in the information to generating the electronic invoice. It is really simple, fast and convenient. To query the invoice issuance status, the merchant can check the invoice details. The operation path is: Query Statistics - Invoice Details - Check the box and proceed with subsequent operations. You can check the invoice issuance status and perform operations such as retry invoicing/redemption/send email/download PDF and other operations on the invoice. The consumer searches for the invoice record. The consumer searches for the invoice record and sends it to the email. Operation path: Open WeChat - find the "District Invoice Assistant" applet - click to enter. The consumer clicks to view the invoice PDF to view the electronic invoice issued, or you can simply The town chooses to send the electronic invoice to the email address, click Send Email, enter the email address, and click Confirm. You can view it in your mailbox. To check the authenticity of units and individuals who have obtained blockchain electronic invoices, they can check and verify through the official website of the Yunnan Provincial Taxation Bureau of the State Administration of Taxation or follow the WeChat public account of the Yunnan Provincial Online Taxation Bureau. They have the right to reject invoices that do not meet the regulations. Okay, that’s it for our study of the blockchain electronic invoice operation this time. If you have any questions, you are welcome to consult the nearest tax authority!

D. What are the blockchain system development platforms?

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Detailed explanation of Fabric blockchain development. This course is for beginners. The content includes Hyperledger Fabric’s identity certificate, MSP service, and permission policy.It includes core concepts such as strategy, channel configuration and startup, and chain code communication interfaces. It also includes operational practices of Fabric network design, chain code, and application development. It is the best choice for learning Fabric blockchain development.

Let me give you a free blockchain blog to check out.

E. Blockchain system development costs

Because the development of blockchain software requires certain technologies, the cost is basically not low.
For example, blockchain wallets, blockchain exchanges, blockchain browsers, blockchain malls, etc. cost hundreds of thousands. If it is to develop a single function, it will cost tens of thousands. If it is custom-developed blockchain software, the price will be higher.
In addition, the development cost of blockchain is also related to the following situations: Blockchain game development cost.
1． There are many types of blockchains: public chains, private chains, and industry blockchains. Prices will vary for different types of development.
2. Blockchain development functions: The more functions required, the higher the complexity and the higher the price, and vice versa.
3. Blockchain application port: Different development ports require different development costs. Cost analysis of blockchain platform development costs.