云函数wx.cloud.callFunction时，为什么返回值没有自己自定义的内容？

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云函数wx.cloud.callFunction时，为什么返回值没有自己自定义的内容？Why does the return value of the cloud function wx.cloud.callFunction have no self-defined content?

During the call, the returned data of the cloud function is returned, but the received result is not customized. The returned content is the same when the return in the cloud function is empty. I don't know where the problem is. Please explain. Maybe there is a problem in one step

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