The Dashun enterprise established in 1997, was the Wenzhou area of the earliest factory of a manufacturer of engine valve, two factory expansion, the ceremony under the plant was built in 2002 as a production base of motorcycle valve. Ryan international automobile and motorcycle parts production base in the new factory was established in 2009 as the automotive and machine-valve production base. In 2011, the wonderful town of Fuling District, Chongqing City, Wenzhou Industrial Park plant to start construction, is expected to be completed and put into production in 2013, as construction vehicles, trucks, agricultural vehicles valve production base.