structure
The citizenship number (the first to sixth digits of the ID number) is a characteristic combination code, which consists of a 17 digit digital ontology code and a check code. The order from left to right is: six-digit address code, eight-digit date of birth code, three-digit serial code and one-digit check code.
Address code
North China: Beijing | 1 10000, Tianjin | 120000, Hebei | 130000, Shanxi | 140000, Inner Mongolia Autonomous Region |1500000.
Northeast China: Liaoning Province |2 10000, Jilin Province |220000, Heilongjiang Province |230000.
East China: Shanghai |3 10000, Jiangsu |320000, Zhejiang |330000, Anhui |340000, Fujian |350000, Jiangxi |360000, Shandong |370000.
Central China: Henan Province |4 10000, Hubei Province |420000, Hunan Province |430000.
South China: Guangdong Province |440000, Guangxi Zhuang Autonomous Region |450000, Hainan Province |460000.
Southwest China: Chongqing |500000, Sichuan |5 10000, Guizhou |520000, Yunnan |530000, Xizang Autonomous Region |540000.
Northwest China: Shaanxi Province |6 10000, Gansu Province |620000, Qinghai Province |630000, Ningxia Hui Autonomous Region |640000, Xinjiang Uygur Autonomous Region |650000.
Taiwan Province Province: Taiwan Province Province |7 10000