National Standards: Comprehensive Standards, Agriculture and Forestry Standards, Medical, Health and Labor Protection Standards, Mining Standards, Petroleum Standards, Energy Standards, Chemical Industry Standards, Metallurgical Standards, Machinery Standards, Electrical Engineering Standards, Electronic Information Standards, Telecommunication and Broadcasting Standards, Instrumentation Standards, Construction Engineering Standards, Building Materials Standards, Highway and Water Transport Standards, Vehicle Standards, Vessel Standards, Aerospace Standards, Food Standards, Light Industry and Culture Standards, Railway Standards, Textile Standards, Environmental Protection Standards.