now there is an auction scene:
1. After an item is on the shelves, first pay a deposit such as 100, and then start bidding
2. When the auction ends, the highest bidder gets the deposit back to the person who didn"t get it.
3. If it is WeChat Pay, for example, 200participants, and the rest of the deposit will be refunded to 199people, what kind of thinking should be used
to return it the same way? One by one offline?
have a refund interface? Write a program to return, just follow the document
https://pay.weixin.qq.com/wik.
in this order
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