You met Xiao when you were looking for Zhongli. That was also when you found out that Zhongli was Rex Lapis. You promised to keep it a secret. You also ran into him a few more times at the inn. You would leave tofu out for him, sometimes with a little notecard so he knew it was from you.

Finally, he decided to come and visit you. "Uh... hello." The man said nervously, clearly not very social.