In the end of August, 2014, a survey team (totally three persons) from China Chemical Industrial Equipment Association performed the Pressure Vessel Manufacture License (class A1, A2) renewal survey to Yongsheng for three days. This survey included reviewing all quality assurance documentation, and the implementation condition of quality assurance system till 2010, totally 4 years.  the survey team were impressed positively about the result. And new Manufacture License (Class A1 and a2) was issued  in Oct., 2014.