China people don't need to register anywhere to use English names. Because the official language of Chinese mainland is only Chinese, only the Chinese writing of the name is registered on the ID card and household registration book; Passports are only written in pinyin with Chinese characters. In Chinese mainland, foreign companies often use English names, but they rarely use them in other business situations. Therefore, in Chinese mainland, as far as China people are concerned, if it is just an ordinary signature to commemorate their personal preferences, it can be signed in both Chinese and English; If you sign a contract and other documents that need legal protection in English, it is tantamount to signing a pseudonym or nickname, which is not protected by law.