After the ID number ID number x stands for 10, if someone's tail number is 0-9, no X will appear, but if the tail number 10, then replace it with X, because if 10 is used as the tail number, then the identity card of the person becomes 19, while the 19 digit number violates the national standard, and the computer application system of China also does not recognize 19 ID card number. X is the Roman numeral 10. Replacing 10 with X can ensure that citizens' ID cards meet national standards.
The resident identity card of the people's Republic of China is a document used to prove the identity of citizens living in the territory of the people's Republic of China. I wrote "ID card" before 1984. Since March 29, 2004, the Chinese mainland has officially launched the second generation of resident identity cards for the resident non-contact IC card smart chips. The two generation ID cards are on the surface of the ID card and the printing anti-counterfeiting technology, using personal color photographs, and can read the information in the digital chip by machine.
The ID number is the only and lifelong identity code compiled by People's Republic of China residents since the date of applying for residence permit. It is widely used by citizens in People's Republic of China to handle matters related to politics, economy, social life and other rights and interests.
Citizenship number is a feature combination code, which is composed of 17 digit ontology code and one digit verification code. The sequence from left to right is: six digit address code, eight digit date of birth code, three digit sequence code and one digit check code.