Changchun Dongshi Technology (Group) Co., Ltd. Was established on September 24, 2002, registered at 9.5 kilometers of Changshi Highway, Erdao District, Changchun City, with Wang Xiaomei as its legal representative. The business scope includes general projects: Engineering and technical services (except planning and management, survey, design and supervision); Technical service, technology development, technology consultation, technology exchange, technology transfer, technology popularization; Engineering and technology research and experimental development; Industrial design services; Manufacturing of special equipment for oil refining and chemical production; Sales of special equipment for oil refining and chemical production