What are the national standard coding rules? Such as industry standard codes.

the code name of the national standard consists of capital Chinese phonetic letters.

the code name of the mandatory national standard is GB, and the code name of the recommended national standard is GB/T ..

the number of the national standard consists of the code number of the national standard, the serial number of the national standard and the year number of the national standard (i.e. the last two digits of the year of publication).

example: GB×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××

Issued by: Order No.1 of the State Bureau of Technical Supervision

Date of issue: August 24, 199

Effective date: August 24, 199

Measures for the Administration of National Standards is a management measure promulgated to better implement the Standardization Law of the People's Republic of China, which has the following technical supervision standards for the country.

industry standard:

name code name code name code

Chinese medicine industry standard ZY postal industry standard YZ medicine industry standard YY

nonferrous metallurgy industry standard YS communication industry standard YD tobacco industry standard YC

ferrous metallurgy industry standard YB rare earth industry standard XB health industry standard WS

foreign trade industry standard WM culture industry standard. Quasi-WH material industry standard WB

land industry standard TD railway industry standard TB petroleum industry standard SY

commodity inspection industry standard SN water conservancy industry standard SL electronic industry standard SJ

petrochemical industry standard SH aquatic industry standard SC commercial industry standard SB

meteorological industry standard QX aerospace industry standard QJ automobile industry standard QC.

light industry standard QB agricultural industry standard NY civil administration industry standard MZ

coal industry standard MT civil aviation industry standard MH forestry industry standard LY

labor industry standard LD tourism industry standard LB education industry standard JY

financial industry standard JR transportation industry standard JT construction industry engineering construction regulations JJ

construction industry standard J. G building materials industry standard JC machinery industry standard JB

customs industry standard HS environmental protection industry standard HJ marine industry standard HY

chemical industry engineering construction specification HGJ chemical industry standard HG aviation industry standard HB

radio, film and television industry standard GY supply and marketing cooperation industry standard GH public security industry standard GA

textile industry standard FZ nuclear industry industry industry standard. Quasi-EJ geological industry standard DZ

electric power industry standard DL earthquake industry standard DB arCHives industry standard DA

press and publication industry standard CY urban construction industry engineering construction regulation CJJ urban construction industry standard CJ

recommended engineering construction standard CECS surveying and mapping industry standard ch ship industry standard CB

packaging industry standard BB.