"I am a cultivator," Lan Wangji tells him. He neglects to mention that he is known as one of the two greatest cultivators of his generation - the other being Wei Ying. It is unnecessary, and would be prideful and boastful, both.

"Gusu Lan is one of the four great cultivation sects. I understood from Lung Tien Xiang that cultivation practice was previously unknown to him?" He looks to see if Laurence has any understanding of the concept, or if he needs to explain further.