During the production of roll up door-metal 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.. In order to deliver satisfactory service at Hongfa Automatic Door, we have employees who really listen to what our customers have to say and we maintain a dialogue with our customers and take note of their needs. We also work with customer surveys, taking into consideration the feedback we receive..