After-sales problems

 · Customers who return or exchange goods without quality problems must bear the factory freight and return freight, and the maximum freight for quality problems is 5 yuan.

 · Quality problems can be repaired for more than 15 days. The maintenance is paid by yourself at double fares. After receiving the goods, you must check the goods and sign for it.

 · Seven-day replacement is supported without affecting the second sale of the product (the shipping fee must be paid by yourself)