Insisting on quality has been a tradition for YE I since the founding of the company. We have set up comprehensive quality standards to monitor during the complex manufacturing processes. We fully enforce the company's policy of total quality control. From incoming material inspection, in-process inspection, to final machine tests prior to shipping, all staff pay special attention to quality details throughout each stage of the manufacturing process. YE I has been certified ISO-9001, which shows our company's efforts in quality control over the years.