Legal analysis: a set of numbers given to the household by the household administration organ when the household name is a self-supporting new household. In other words, the account number is the code of the account name, which is the same as the ID number. At present, the household registration number of the household registration book consists of nine digits, which is randomly generated by the household administration system of the public security organ. The account number exists in the account book, which is often called the number in the account book. The number on the household registration book is necessary and easy to find.

Legal basis: Regulations of People's Republic of China (PRC) Municipality on Household Registration Management.

Article 1 These Regulations are formulated for the purpose of maintaining social order, safeguarding citizens' rights and interests and serving socialist construction.

Article 2 Both China people and China citizens shall register their household registration in accordance with the provisions of these Regulations. The accounts of military personnel shall be handled by military organs in accordance with the relevant provisions on the administration of military personnel. These Regulations shall apply to the household registration of foreigners and stateless persons living in People's Republic of China (PRC), except as otherwise provided by laws and regulations.