Why did China Agricultural Bank provide a household registration book for the recruitment interview?

Agricultural Bank of China requested to provide the household registration book for qualification examination in the recruitment interview. Many units, especially state-owned units, generally require job seekers to provide resident ID cards, household registration books, academic certificates, degree certificates, etc. to participate in the qualification review when entering the interview, that is, to verify the information you filled in when you signed up and check your certificates and supporting materials.