"...Wei Ying." Lan Wangji looks at him, seeing how he stained him and marked him. He felt shame and embarrassed, and felt at fault that he made him cough. But Wei Wuxian did a good job because he is now empty.

He looks around the room and found a spare towel. Part of him is unable to look at him, but he managed to try to make sure he is all right. "You can spit it out." He thinks whatever liquid that came out of him, it must be awful, and he didn't want Wei Wuxian to endure that.