First, we find the Tik Tok icon on the mobile phone desktop, and click to open the Tik Tok software.

After entering Tik Tok's video interface, we found my options at the bottom, and then clicked Open.

After entering the personal interface, we find three buttons in the upper right corner of the interface and click Open.

Then we can enter the setting interface of Tik Tok and click the first option in the interface to edit personal data.

After entering the profile interface, we can see that there is a signature option in the interface, and we can click this option.

Then we enter the interface to modify the signature. We will enter our personalized signature in the personalized signature column, and then click the Save button in the upper right corner.