After the delivery of the products, the quality of our company can be traced back for 3 years, during which customers can search the original production records at any time. The sales department communicates with customers in a timely manner, and receives customers' comments and feedback, and takes corrective and preventive measures in a timely manner.in addition to the losses caused by force majeure, we will refund or replenish the unqualified products as soon as possible, and be responsible for solving the quality problems such as processing and assume the corresponding economic responsibilities. The customer satisfaction survey is issued to customers on a regular basis, and the corresponding data are analyzed and counted to improve customer satisfaction.