There is no reason to return goods within 30 days. When returning goods, you need to keep the goods in good condition. Before returning goods, you need to contact the merchant and fill out the return application form.

Promise that the goods sold are authentic and legal, and provide certain quality assurance, such as ensuring that the goods have no quality problems, providing after-sales service, etc.

Provide equipment repair and maintenance services, such as providing free equipment repair, upgrading and other services