Through the cooperation of the company's leaders and colleagues for more than half a year, Liaoyang Xiangyue Sealing Engineering Co., Ltd., a subsidiary of the company's holding company, officially obtained the "Special Equipment Installation, Reform and Maintenance License of the People's Republic of China" on March 20, 2017, with pressure plugging, thus possessing the qualification and ability to independently undertake pressure sealing engineering projects, so as to open up the northeast and northwest markets for the next company. It provides a strong guarantee.