While strictly producing in accordance with the current technical standards of the country and industry, the company continuously improves the quality of the quality assurance system. It has advanced testing methods such as mechanical performance testing, chemical composition analysis, low temperature impact test, metallographic structure testing, bolt tightening axial force and torque coefficient testing, spectral testing, magnetic particle testing, and piece-by-piece online hardness testing, etc., therefore quality can be effectively controlled in all aspects of the process, heat treatment, inspection, physical and chemical testing.