The State Inspection Group is a state-owned holding enterprise, the full name of which is China State Inspection and Testing Holding Group Co., Ltd. The industry is specialized in technical services, and its jurisdiction is Chaoyang District, Beijing, mainly engaged in corporate headquarters management, product quality inspection, construction engineering quality inspection and appraisal, etc.

China National Inspection and Testing Holding Group Co., Ltd. (stock abbreviation: National Inspection Group, English abbreviation: CTC, stock code: 603060) originated from the Inspection and Certification Division of China Institute of Building Materials in the 1950s. After 70 years of unremitting efforts and persistent pursuit, it has formed five business platforms: inspection and testing, certification and evaluation, testing instruments and intelligent manufacturing, measurement and calibration, scientific research and technical services, and is committed to providing customers with quality, environmental protection, green, safe and healthy services.

Headquartered in Beijing, Guo Jian Group has 63 legal entities, 34 national and industrial product quality inspection centers in 22 provinces (autonomous regions and municipalities directly under the Central Government) and more than 5,300 outstanding employees. The service capacity covers the design, research and development, production, use and logistics of building materials and construction engineering, environment, intelligent manufacturing, rail transit, medical health, food and agricultural products, cosmetics and daily chemicals, geology and minerals, etc.

The State Inspection Group insists on innovation and development, and has completed more than 200 scientific research projects at or above the provincial and ministerial levels in recent years. Presided over the publication and research of ISO and IEC international standards 16, more than 700 national, industrial and local standards, and awarded intellectual property rights 1300; Actively practice the responsibility and responsibility of central enterprises and become the only environmental quality control service provider for national key projects such as Olympic project, Shanghai Cooperation Summit, APEC meeting and BRICS meeting; Serve the national double carbon target and provide technical services to nearly 3,000 enterprises in more than 20 provinces and cities across the country.

The subsidiaries of Guo Jian Group are: Suzhou Co., Ltd. of China Building Materials Inspection and Certification Group, Shaanxi Co., Ltd. of China Guo Jian Inspection and Certification Group, Qinhuangdao Co., Ltd. of China Building Materials Inspection and Certification Group, xi 'an Co., Ltd. of China Guo Jian Inspection and Certification Group, Xiong 'an Co., Ltd. of Guo Jian Inspection and Certification Group, etc.