1. Install and debug products for consumers;
2. According to consumer requirements, provide technical guidance on use and other aspects;
3. Guarantee the supply of repair parts;
4. Responsible for repair service, and provide regular maintenance and regular maintenance;
5. Provide consumers with regular telephone return visits or home visits;
6. Implement "three guarantees" for products, that is, repair, replacement and return (many people think that product after-sales service is "three guarantees", which is a narrow understanding);
7. Handle consumer letters and visits and telephone complaints, answer consumer inquiries. At the same time, it collects consumers' opinions on product quality in various ways and improves it in a timely manner according to the situation.