During the overhaul work of CNPC Guangxi Petrochemical Company from March to April 2020, our company assisted CNPC Sixth Construction Co., Ltd. to participate in the overhaul work of continuous reforming, PSA, MTBE, aromatics, hydrogenation and other units of Guangxi Petrochemical Company while doing a good job in epidemic prevention, providing professional constant torque construction guidance, hydraulic wrench, pneumatic torque wrench, screw for sixth construction company Training and on-site follow-up service for bolt washer. The quality and efficiency of Guangxi Petrochemical overhaul have been greatly improved. In particular, during the reassembly of R201 \ r301 exchange reactor of hydrogenation unit, due to the special specification of bolts, our company urgently coordinated the corresponding equipment from the company, and sent the equipment to the construction site the next day, without delaying the valuable maintenance time of customers. Guangxi Petrochemical Co., Ltd. and CNPC No.6 Construction Co., Ltd. have given a high evaluation on the technical level, service level and personnel quality of our company.