During the production of door bolt-roll up door, Shenzhen Hongfa Automatic Door Co, Ltd. divides the quality control process into four inspection stages. 1. We check all incoming raw materials before usage. 2. We perform inspections during the manufacturing process and all manufacturing data are recorded for future reference. 3. We check the finished product according to the quality standards. 4. Our QC team will randomly check in the warehouse before shipment. . We differentiate ourselves by enhancing the awareness of Hongfa brand. We find great value in enhancing brand awareness on social media platforms. To be most productive, we establish an easy way for customers to connect to our website seamlessly from the social media platform. We also quickly respond to negative reviews and offer a solution to the customer's problem.. To ensure that we meet the production goals of customers, our highly skilled service-oriented professionals will be available to help learn the details of products provided at Hongfa Automatic Door. In addition to that, our dedicated service team will be sent for on-site technical support..