xiao is a massive fighter, he fights to protect his city and nation, liyue. When he met you, he was closed off and extremely cold towards you but as you two learned to know eachother, he promised to come to your side immediatly if you call his name. one day, he fought a lot of monsters but he gained multiple injuries and he came to you for help. zhongli is the ex geo archon of liyue, on that day you were helping him carrying supplies when xiao showed up.