Tianrun Crankshaft Co., Ltd. (Tianrun Crankshaft) locates in No. 2-13, Wendeng District, Weihai City. Tianrun is the largest crankshaft specializing manufacture enterprise in China. Its main products are the "TIAN" brand internal combustion engine crankshaft. Tianrun went public in Shenzhen A Stock Exchange on Aug. 21th, 2009. Now there are more than 2800 staffs, including more than 800 all kinds of professional technical talents. The plant covers 868, 000 square meters and the total assets are 4.4 billion yuan. Tianrun has three branches including Wendeng Hengrun Forging Co., Ltd., Nanhai Foundry and Forging base and Weifang Branch. The business involves the fields of combustion power components, railway equipments and machine equipment development etc. The main seven business modules include the crankshaft used in marine engine, heavy-duty truck, light-duty truck, passenger-car, connecting rod, casting and forgings. Tianrun is the president of CICEIA crankshaft, con-rod and high strength bolts branch.