The WeChat public account repeatedly followed and canceled the account, and then the user avatar address obtained by calling the WeChat interface was incorrect. You can get it the first time you follow it, and you can get it again after canceling it multiple times. When you enter the obtained headimgurl address in the address bar, there is no picture, and the address is different from the previous one. . Solve
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The user avatar can be continuously changed, and of course the image address is also constantly changing