There is no fixed standard or format for the writing of bian's signature, because the signature is usually the embodiment of a person's personality and preferences. The following are some common signature writing methods for your reference:

1. Use full name: Bian Dingyi

Use initials: BYD

3. Use the initials of the surname and the full name: B YD (other space symbols can also be used).

4. Use personalized symbols or patterns: you can use symbols such as hearts, stars and flowers for decoration.

5. Write in your favorite font or style: You can choose different styles of fonts such as cursive script, regular script and English font.

Please choose your signature writing method according to your preference and style. I hope I can help you!