This is a little different from what we do abroad. Signing abroad is not for understanding, because you want to know how to spell your name, and they will look at the printed part of your certificate. Signing is actually just a comparison of whether you are yourself or not, so your passport is the only file with your personal signature registered abroad. So when I apply for a passport, I can leave a personalized signature, even if it is not Chinese characters. For example, I used the handwriting of the pinyin letters of my name at that time. As for the specific personality, please be sure to communicate with the licensing department. After all, everything must have a scale.
I hope I can help you. I wish you a pleasant trip abroad.