ETFs China Oilfield Services Limited Shanghai S.E.

China Oilfield Services Limited is a comprehensive oilfield service provider. The Company mainly operates through four business segments. The Drilling Services segment is mainly engaged in the provision of oilfield drilling services. The Oil Field Technical Services segment is mainly engaged in the provision of oilfield technical services, including the logging, drilling fluids and directional drilling services. The Geophysical and Engineering Exploration Services segment is mainly engaged in the provision of seismic prospecting and engineering exploration services. The Marine Support Services segment is engaged in the transportation of supplies, including the delivery of crude oil, as well as refined oil and gas products. The Company mainly operates its businesses in domestic and overseas markets.