Hospital surgery can be signed by non-immediate family members, but in general, immediate family members are required to sign. Legally speaking, the consent form for surgery, anesthesia and power of attorney can be signed by the patient himself, but in practice, hospitals often require the patient himself and his close relatives to sign the consent form for surgery and anesthesia. The main reason for the hospital to do this is to avoid the risks that may be brought by the operation, and to guard against the troubles and disputes that the unpredictable risks in the operation may bring to the hospital and medical staff.