You can sign. The power of attorney for CCB's personal information can be signed, and the power of attorney for CCB's time deposit is a preventive and supervisory measure. As of June 5, 2022, according to the provisions of the Commercial Bank Law, CCB must fill in the Personal Deposit Business Information Authorization Letter when handling time deposits, which is a preventive and regulatory measure to prevent individuals from making mistakes in collecting money and opening certificates of deposit, so that CCB can ensure the information security of depositors.