After Wechat's APP payment is successful, the notify_url set in the java server is not called back.

after the APP calls WeChat Pay successfully, the WeChat end prompts the payment to be successful, and also initiates the deduction. However, the notify_url set in the java server at the app backend is not called back.
callback address: http://39.104.154.1:8080/hdfks/appksxt/wxpay/payNotify.do, the public network is accessible.

what precautions does Wechat APP pay for? is there anything wrong with my callback address?

Jul.01,2021
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