When I lived in Beijing (10+ years ago), CNY would be constant fire crackers and fire works (but more bang bang than flashy lights) from 9PM to 3 or 4 AM. And I don’t mean just constant fire works, I mean what it must have felt like being bombed by multiple fleets of bombers in WW2. You should just hear constantly fire work shrapnel hitting your window.

I flew in once on CNY and could see constant flashing all below during our descent into Beijing capital. The whole country side looked like it was exploding, and the villages were nestled on mountains or in mountain valleys to great effect.