The application for bail pending trial does not have to be signed by immediate family members. If it is applied by a close relative, the close relative must sign. If it is applied by a defense lawyer, the defense lawyer must sign.

Legal provisions: Article 95 of the "Criminal Procedure Law of the People's Republic of China" criminal suspects, defendants and their legal representatives, close relatives or defenders have the right to apply for changes in compulsory measures. After receiving the application, the People's Court, People's Procuratorate and Public Security Bureau shall make a decision within three days; if they do not agree to change the compulsory measures, they shall inform the applicant and explain the reasons for their disagreement.

Article 106 The meanings of the following terms in this Law are:

... (6) "Close relatives" means husband, wife, father, mother, son, daughter , brothers and sisters.