Even he knows what that date is and stares at the other man in shock. That is not the first time they met but definitely the first time they actually talked. Is this what they consider love at first sight? Is his own Lan Wangji the same?

"If you knew then, why did you waste that precious jar of Emporer's Smile!? You don't treat people you like with such hostility!" He's going to assume at least this much was the same. A fight on the roof top, the loss of one jar, the breaking of so many rules on just his first night.