It depends on your specific relationship with the account holder. For example, if you are the property heir of the account holder and inherit the property in the account he opened in China Agricultural Bank, then you have the right to ask the bank to provide the specific information of the sub-account. For example, if you have a litigation relationship with the account holder, you can apply to the relevant authorities (such as public security bureau, procuratorate or court) for evidence collection, and they will ask the bank for account information. For details, please consult a regular law firm or legal hotline.