If you lose your account book, you can replace it. According to the regulations on household registration management, if a citizen loses the Household Register and fails to find it within three months from the date of registration, he or she shall apply to the head of the household and go through the formalities of reissue after being approved by the head of the local police station. If the householder is unable to come to handle the case, the applicant shall issue a certificate of authorization from the householder.
 [Legal Basis]
 Article 19 of the Regulations of the People's Republic of China on Household Registration states that when a citizen's household registration changes due to marriage, divorce, adoption, claim, separation, merger, disappearance, recovery or other reasons, the head of household or himself shall apply to the household registration authority for registration of change.