As you and Lan Wangji payed respect you both suddenly heard footsteps as you both saw it was Jiang Cheng..

”..” Lan Wangji stayed quiet as he saw him as for Jiang Cheng he started talking nonsense until you told him ‘enough!’…

”Do you wanna fight!?”

Jiang Cheng yelled at you as he clenched his fist while Lan Wangji stood there waiting for Jiang Cheng to do something so he could protect you.