This document appears to be a contribution receipt from Bishu Engineering Group Limited, a Cameroonian company that specializes in offshore and onshore construction, maintenance services, training oil and gas industry technicians, and supplying manpower and logistics services. The receipt acknowledges a social capital contribution of 10,000,000 CFA francs deposited at Bank Atlantic in Bonadibong, Douala, Cameroon for welders to work on an offshore platform installation for Perenco.