After my Huawei mobile phone is connected to the computer, Huawei application assistant is installed, and the driver display is normal, and the mobile assistant is also connected normally, but ADB just can't recognize the version number of the mobile phone.
The problem is that USB debugging is not actually turned on at this time. Because when the mobile phone is connected to the computer, the mobile phone has been prompted twice whether to turn on xxx, and I thought that USB debugging had been turned on in those two consents (the first feeling I was prompted was that the mobile phone was asking me whether to turn on debugging, so I never read the notice carefully), so I went to into the pit, and Baidu just couldn't connect to ADB in any way.