A wholly-owned subsidiary of Jinan Rail Transit Equipment Co., Ltd..

Shandong Hua Teng Environmental Protection Technology Co., Ltd., a wholly-owned subsidiary, is a high-tech enterprise with the world's most advanced closed vacuum sewage treatment technology, and the only designated enterprise in the domestic railway passenger train toilet collection system. It is the largest and most powerful professional enterprise that designs and manufactures toilet collection systems for railway rolling stock and centralized sewage collection and discharge systems for large-scale buildings and public facilities in China.

Shandong Tongli Steel Structure Co., Ltd., a wholly-owned subsidiary, has obtained the national special qualification for large-scale steel structure manufacturing (only 23 in China) and the third-class qualification for steel structure construction, and has the D-class pressure vessel production qualification. At the same time, it invested/kloc-0.20 billion yuan to build a large-scale steel structure production base with a production workshop of 30,000 square meters and a series of large-scale equipment. It has successfully entered the wind power industry in China, and has the production and construction capacity of wind power towers and large steel structure products with different specifications.

Shandong Tonglida Intelligent Machinery Co., Ltd., a wholly-owned subsidiary, mainly develops and produces railway special intelligent tightening equipment, and its products have accounted for 70% of the domestic railway tightening equipment market. Intelligent machinery industry has been successfully extended to automobile, shipbuilding and household products.