Our company has strict QC rule to control the quality from the raw material to the final products.We will check every batch of goods by 100% at the same time out QC Supervisory control system will trace the production line.The test will be repeated as soon as we find any abnormal.Our testing lab is equiped with Low-relaxation testing machin,WJJ-10C motor bending test machine,DNS100 electronic universal testing machine,YNS-WX600 electro-hydraulic servo universal testing machine etc. Quality concroling is the first one in Kaiyuan company and every worker in Kaiyuan.What you are worrying is just what we are doing!