What is the principle of oppo mobile phone changing wallpaper on holidays?

First of all, you need to turn on the relevant switches in Settings-Display-Festival Wallpaper, and you also need to set the lock screen style to pattern unlocking or other unlocking and then display it in the bright screen state of locking but not unlocking. Please refer to the holiday wallpaper tutorial. /article/B2C186c8f0dc04c46e6ff8b.html In addition, not all festivals have wallpaper. Yes, there are at Christmas, but there are no holiday wallpapers about Christmas Eve and winter solstice.