Wechat vouchers are successfully issued through the advanced interface. How do users receive notifications of successful issuance?

dock with Wechat"s voucher interface and issue vouchers to specific users. After the API is successfully called, the user cannot find the location of the voucher, only when he is prompted to use the voucher at the time of payment.

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-64f5-1b2b295-2add6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2b295-2add6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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