1. According to consumer requirements, provide technical guidance on use and other aspects;
2. Guarantee the supply of repair parts;
3. Provide consumers with regular telephone return visits or home visits;
4. Implement "three guarantees" for products, namely repair, replacement and return;
5. Handle consumer letters and visits and telephone complaints, answer consumer inquiries. At the same time, it collects opinions of consumers on product quality in various ways and improves them in a timely manner according to the situation.