Hebei Three Ring Engineering Consulting Co., Ltd. (HBTR) is a wholly-owned subsidiary of Tang Steel International Engineering Technology Co., Ltd. (TSIC). It was established in 1998. It holds the comprehensive qualification of national engineering supervision and the qualification of project tendering agent.

Bohai Guoxin (Beijing) Information Technology Co., Ltd. is a company providing information technology and professional services to customers. Relying on the construction of enterprise informatization in China's iron and steel industry, the company has gradually developed into a leading information technology service provider based on China, serving the world and the industry.

Established in 2014, Tangshan Yuxiangzhuoyi Engineering Cost Consulting Co., Ltd. is a wholly-owned subsidiary of TSIC. It is a cost consulting enterprise with steel metallurgical cost consultation as its service brand and other intermediary services in the field of construction engineering.

Beijing Sinotech Engineering & Technology Co., Ltd. ,the holding subsidiary of Tang Steel International Engineering Technology Corp.(TSIC), is overseas business window units, which is responsible for development and expansion of overseas markets, overseas project operation and management of TSIC, provide engineering and technical consulting, development and promotion of the technology and equipment construction project management, economy, trade and other services for domestic and foreign customers.

The achievements of the international BIM technology in Tangshan Steel