关于支付凭证小程序？

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关于支付凭证小程序？About the payment voucher applet?

The payment voucher enters into the merchant app. I set it in the background and can't be unbound. Then the applet is no longer used. After each payment, entering the merchant applet is not the one you want. There is no place to set and adjust it. I hope wechat will give us a method to deal with it and see what the problem is

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