The steps to change the name and nickname of Douyin are as follows:

1. Open the Douyin APP and enter the "Me" page. Here you can see your current nickname and other personal information.

2. Click the Edit Information button to enter the personal information editing page. On this page, you can modify your nickname, avatar and other personal information.

3. Find the nickname option and click to enter the nickname editing interface. Here you can enter your desired new nickname. It should be noted that the new nickname cannot violate Douyin’s community rules. For example, it cannot contain violence, pornography, vulgarity and other harmful information.

4. When entering a new nickname, if you want to add a numerical sequence to the nickname, you can directly add Arabic numerals after the nickname, such as "Douyin Xiaoming 1" or "Douyin Xiaoming 2", etc. But please make sure the nickname is no longer than 16 characters to avoid exceeding the limit.

5. After modifying the nickname, click the "Save" button at the bottom of the page to save the modified personal information. At this time, your new nickname will appear on Douyin's personal homepage, and your fans and friends can also see your new nickname.