Founded in 1970, the factory moved from Wushan County, Gansu Province to Lianyungang City, Jiangsu. The factory possesses powerful R & D as well as manufacturing capability. The factory makes four main series of products consisting of more than 40 kinds of drilling machine tools. The main products include XY-series core drills, which are applied in solid mine bed exploration drilling with the depth of 100-2200 meters, engineering geological exploration, superficial-zone petroleum and natural gas mining, mines’ gallery ventilation and water discharge tunnel drilling; CQ-series engineering drills, which are suitable for 0.8-3 meters diameter hole foundation stakes, located in complicated layers and hard layers, for bridge, road tall buildings constuction; FDP-series hydraulic directional drilling rigs, which are mainly used in the consturction of underground pipe systems; and hydraulic rotary rigs. Lianyungang Huanhai Machinery Factory is one of the leading manufacturers of geologicl exploration core drilling rigs for medium-depth hole drilling. In the main products, one of them is awarded a National Silver Medal, three of them are awarded the prize of National Inovated Product and four of them are in the leading position in China.