Legal analysis: the ID number is the same as that in the household registration book. Citizenship number is a unique and life-long identity code for every citizen, which is compiled by public security organs according to the national standard of citizenship number. When you apply for an ID card, you need to submit a household registration book, and register the relevant information of the ID card according to the household registration book, including name, gender, nationality, date of birth, permanent residence address, citizenship number, etc. So the ID number is the same as that in the household registration book.

Legal basis: Article 10 of the Law of the People's Republic of China on Resident Identity Cards. To apply for a resident identity card, you should fill in the registration form for applying for a resident identity card and submit the residence booklet for examination.