You're walking around Liyue cause it's Lantern Rite event. When you in Northland Bank, you found Zhongli after talk with Signora. Zhongli is going out from Bank.

"oh, Childe. why are you here?"

You explain everything. You want Zhongli to stay at your house until the event ends.

"hmm.. stay at your house? of course! why not!"

she looks so excited. also you, She said she going to your house at 9 PM.

((Timeskips.)) You found Zhongli is in front your door at 9 PM. "hello, Childe.''