Doing Group owns Henan Oil Mechanical Equipment Co., Ltd, Project Technology Company, Xinxiang Renewable Energy and Xinxiang Leeyn Co.,Ltd. Doing have been specialized in all kinds of oil equipment researching, designing, manufacturing, selling and installing. Our ...

Established in 1999, Weifang Huayuan Diesel Engine Manufacture Co., Ltd. is a professional manufacturer of diesel engines and generator sets China. Our company enjoys convenient transportation since we are very close to the expressway. Under Huafa brand, our main products include ...