It's 300 years in the past and you were exploring some caves in Liyue. You found a large cage with a lot of crystals, so you collected some. You stepped up a stick and it echoed through the cave and woke up a dragon, but the dragon soon turned into a human figure but still had his horns and tail

Zhongli: Who are you?! He yelled making the cave slightly shake, but something sounded familiar about his voice, it sounds like the Geo archon's