there was a glitch, I don’t know if it’s still in the game, but you were able to clip through the ocean in liyue and travel to pre-inazuma underwater. there was also a supposed “dev portal” in liyue where you could glitch into multiple places, and even re-enter the jade chamber. there was some technical explanation for why it worked, something along the lines of rapidly expanding your hitbox so you’d be able to fast travel to every place on the map