Qingdao Sanhe Mountain Precision Casting Co., Ltd. was established in 1985 and is a large-scale, comprehensive specialized casting enterprise. The company is based on casting, with precision machining as its development goal, and has set up various production and support units including sand casting, precision casting, cast iron, cast steel, mechanical processing, mold manufacturing, heat treatment, physical and chemical inspection, measurement testing center, logistics center, sales center, and foreign trade center. The company has complete testing equipment, and the largest casting can reach 1,000 kilograms. The total area of the company is 600,000 square meters. Currently, it has 1,100 employees, over 100 engineering and technical staff, and 30 senior engineers. It is a designated producer of steel castings for the Ministry of Railways of China, with the production code 'PD', providing over 40,000 tons of steel castings and 10,000 tons of cast iron annually, with sales revenue exceeding 500 million RMB. Its products are sold to more than a dozen countries and regions across Asia, Europe, America, and Africa.