We have established a complete after-sales tracking and feedback mechanism. After customers receive coating products, we will regularly follow up with customers to understand the product usage and customer satisfaction. Customer feedback will be collected through telephone, email, or online questionnaires. Any questions or suggestions put forward by customers will be recorded in detail and followed up and processed promptly. The after-sales team will feed back the processing results to customers in a timely manner to ensure that every request of customers is properly resolved. Meanwhile, the information fed back by customers will be sorted and analyzed and used as an important basis for optimizing products and services to continuously improve our service quality and customer experience and establish long-term and stable cooperative relationships with customers.