Jiang Wanyin knows better than to hope Wei Wuxian hasn't been throwing himself all over Lan Wangji here, because he's seen them already, and Wei Wuxian is definitely still throwing himself all over Lan Wangji here. He focuses on the horse; he doesn't want to yell in front of an innocent animal like that. As evenly as he can, he grits out, "Then you will also know Wei Wuxian. They're fucking inseparable."