How to turn off Apple 14pro mobile phone dialing +86?

On Apple 14pro mobile phone, the way to turn off dialing +86 is to turn off the dialing assistant function.

The dialing assistant function of Apple 14pro mobile phone can automatically add the international area code +86. To turn off this function, first turn on the phone, enter the setting menu, slide the screen up to find the phone function, click to enter the phone menu, then slide the screen up to find the dial assistant function, and click the switch behind the dial assistant to turn it off. This will turn off the ability to dial +86.