1. Taxpayer identification number: it is the name of the tax type on the tax registration certificate. The taxpayer identification number, usually referred to as "tax number", is the number on the tax registration certificate, and the identification number of each enterprise is unique, which is equivalent to the "ID card" number of the enterprise.

2. The taxpayer identification number consists of 15 digits, 18 digits or 20 digits (character type), in which: for taxpayers of enterprises, institutions and other organizations, the 9-digit code compiled by the State Bureau of Technical Supervision (where the "-"sign between the main code and the check digit is omitted and not printed) is preceded by the 6-digit administrative division code * * 6544. The taxpayer code issued by State Taxation Administration of The People's Republic of China, People's Republic of China (PRC) is 15 digits, in which: 1-2 digits are provincial and municipal codes, 3-6 digits are regional codes, 7-8 digits are economic codes, 9- 10 digits are industry codes, and15 digits are.