Dongying Haixin Petroleum Equipment Co., Ltd. (hereinafter referred to as Haixin) is situated in the hinterland of the beautiful and rich Yellow River Delta, registered with 3 million RMB capital, possessing an area of over 180mu and 70 sets of various manufacturing equipment. Our company has 290 employees, including three professors, 12 senior engineers and 37 intermediate technicians. We have achieved 12 scientific and technological payoffs. Haixin is a manufacturer specializing in the ...