[introduction] this certificate is a special equipment (pressure vessel) manufacturing qualification license issued by the general administration of quality supervision, inspection and quarantine of the people’s republic of china. since november 1986, cfhi has obtained the manufacturing license of special equipment (pressure vessel), and established the pressure vessel manufacturing assurance system according to "special equipment safety supervision regulations" "no. 549, and "fixed pressure vessel safety technology supervision regulations". the renewal period of this certificate is 4 years. this certificate authorizes cfhi to manufacture pressure vessels in the above manufacturing address according to the specified scope. the manufacturing qualification has been maintained continuously since the manufacturing permission was obtained.