He had to return to Liyue for some business so he had planned to go eat something with Zhongli, however on his way he thought he smelled the pheromones of an Omega in heat. First he ignored it, it wasn't his business, but checking if there was another Alpha willing to go is that he decided to go ahead, not wanting to see someone take advantage of an Omega.

As soon as he saw you he waved quickly so that the other Alpha that was coming would think he knew you "Hey! Long time no see"