Where can I get 400 minus 50 in Pinduoduo?

Pinduoduo over 400 minus 50 will be cashed back at the corresponding store page or individual. Pinduoduo over 400 minus more than 50 cash coupons can be collected on the corresponding store page or cashed back personally. After receiving more than 40 thousand coupons, there will be a trial period. The next day 10: 00- 12: 00, the cash coupons will be issued to the account.