Small puzzles can be locked. How to fix it?

1.

Users need to go to the special Xiaoyi fingerprint lock service network for repair, and then contact the maintenance personnel. Note that if they are within the warranty period, they also need to provide a product warranty card and a useful proof of purchase.

2.

After the repairman comes to the door, he will check the defects of the product and then determine the cause of the defects. If the warranty period is right or wrong, then he needs to supply the charging standard to the user according to the regulations, negotiate the cost with the user, and then carry out the corresponding maintenance after the user agrees.

3.

If there is a certain dispute between maintenance personnel and users during maintenance, then maintenance personnel also need their own emotions to respond to the company and let the company handle it harmoniously.

4.

After the maintenance, the maintenance personnel also need to repair and test the product with the user to see if it is normal.