CMIC Ocean En-Tech Holding Co., Ltd., formerly TSC Group Holdings Limited, is an investment holding company principally engaged in oilfield engineering-related businesses. The Company operates through three segments. Capital Equipment and Packages segment is engaged in the design, manufacture and installation of land and offshore rigs. Oilfield Expendables and Supplies segment is engaged in the manufacture and trading of oilfield expendables and supplies. Engineering Services segment is engaged in the provision of engineering services.