Yantai Yunsheng Petroleun Machine Accessories Co., Ltd. funded in 1997, presently is one of biggest enterprises producing double protection sucker rod joint inside China. Our company is located in Laishan Shengquan Industrial Park, beautiful seashore city- Yantai, to north neighbouring Yantai Port, to south next to Yantai Airport, with beautiful scenery, comfortable climate and convinent traffic. Furthermore, our company has fixed assets RMB 10, 000, 000.00 yuan, 150 employees, among them there are 26 engineers. It covers 30000 square metres, and construction area is 15000 square metres. Main products: deflection-proof and abrasion-proof sucker rod joint, and common joint. Our company owns the advanced technology, especially about the alloy coat abrasion-proof sucker rod joint is on top level of the world.