Why does Meituan's children's photography need to cancel the code before shooting?

Mandatory retention of customers. Meituan children's photography has not been filmed, so we must cancel the code first. Generally, customers are forced to stay. In this case, it is recommended to call the customer service hotline to make a complaint. Write-off code is a kind of electronic certificate, which will automatically generate a series of random numbers and barcodes for the person filling out the form after filling out the form. The organizer can write off the form by scanning with a scanning gun or entering numbers on the computer write-off page, and the data background will also record the write-off status.