In March 2016, Chongqing Energy (Guizhou) Coal and Electricity Co., Ltd. and CCTEG Xi 'an Research Institute jointly applied for Surface Gas Control Demonstration Project in Jiangnan Coal Mine of Guizhou Province. The main works of the project include two U-shaped horizontal well groups and two cluster wells (5 wells). The EPC general contracting project undertaken by CCTEG Xi'an Research Institute includes drilling, coring, testing, perforation, fracturing, and coalbed methane drainage and other operations. The construction progressed smoothly and was highly recognized by the expert team.