Henan Hadong Energy Saving Technology Co., Ltd. is a national high-tech enterprise specializing in the production of engine blocks. It has established two production bases in Zhengzhou and Chongqing, with a total plant area of over 20,000 square meters and a total investment of 50 million yuan. The company has more than 200 employees (including over 20 technical R&D personnel), and owns two engine block production and assembly lines, more than 20 machining centers, and over 100 sets of various processing and testing equipment. It realizes full inspection and hot-running test of products before delivery, and can provide 100,000 sets of original-quality engine blocks, cylinder head assemblies and cylinder block assembly series products to domestic and foreign customers every year....