There are currently four access methods available: public number payment, APP payment, code scanning payment and card payment. In addition to the APP payment access method, the other three need to apply for the WeChat public number, and upgrade to a service number and get certified. After passing the certification, log into the public platform again, click on WeChat Payment in the navigation bar, then click on the Open button, fill in the relevant information according to the requirements inside, and upload the relevant materials, and submit for review. Audit time is generally 7 working days. Through the audit, the mailbox will receive an email, informing the merchant number and password and other information, as well as the development of documents and so on, according to the development of documents to access WeChat Pay, and continue to go to the merchant platform to verify and sign the agreement online it. If it is APP payment, please get the account number of development platform first, and get the developer qualification certification. You can apply for this certification on the development platform and submit relevant information. After the certification is passed, submit the APP to get the AppID in order to continue the application. After that, log in to the open platform, select the required APP in the management center, click on the right side of the application to open, and submit the required materials. After passing the audit, you can log in to the merchant platform for verification, and finally sign the agreement online and start the design and development.