To log in to 1688 payment account, you first need to open the 1688 website and click the "Login" button in the upper right corner.

In the pop-up login window, enter the registered user name and password, and then click "Login" to enter the account page.

In the account page, select "Alipay Account" and enter the Alipay account and password to bind. After completion, you can make online payments or collection operations. Note that in order to ensure the security of the account, you need to be vigilant when logging in and do not easily disclose personal information and login passwords.