Wechat's refund returns "the accepting institution must be transferred to sub_mch_id".

when Wechat returns a refund,
the xml
< xml > < return_code > returned by sub_mch_id
must be passed into
< xml > < return_code > < / return_code >
< return_msg > < / return_msg >
< / xml >
excuse me, is there such a situation and how to solve it?

Wechat-developed WeChat-Pay java

Aug.12,2021

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WeChat Pay after the success of the callback function has not been completed, the user exited the page, how to solve?
yesterday, the company s project was launched and suddenly found that many users reported that they were still waiting for payment after the successful payment of their order. 1 it seems that the callback has no effect because many people close...

Php Wechat-developed WeChat-Pay javascript official-account

Mar.15,2021

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b22211-2ae45.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b22211-2ae45.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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