On August 8, 2011, Yuanfeng signed a contract with a fly ash comprehensive utilization plant, which is a construction machinery company affiliated to Anshan Iron & Steel Group. According to the contract, our company was responsible for the process, architecture, structure design and construction of the concrete foundation, the steel structure silo body (including the roof), the discharge system, the feeding of cement silo, and the discharge system of two 50,000-ton fly ash steel silos. The construction period was 120 days. The steel silo system was put into use in April 2012, and still remains sound status now after years of uninterrupted operation without any major failure. Therefore it is praised and acclaimed by the owner.