Liu Guangxin, Manager of Engineering Technology Service Branch of Lianda Company of Tianjin Dagang Oilfield Tongxin Petroleum Technology Group Co., Ltd. He carried forward the spirit of Tongxin Lianda people to solve difficult problems, solved more than 70 construction technical problems of 5 projects in Shenyang Chemical Industry Park, and was called the key man to get through the "last mile" of construction; He carried forward the research spirit of Tongxin Lianda, refined 12 on-site construction management systems according to local conditions, optimized 23 cost expenditures, and achieved a double harvest of output value and benefits@ Tianjin Dagang Oilfield Tongxin Petroleum Technology Group Co., Ltd