He accepts, recognizing the kindness offered, and appreciating it. Lan Wangji takes a polite sip and then settles his fingers around the cup on the table and tries to think what else to say.

(Something complicated flickers in his eyes when Tom mentions marks left, but he does not speak of that, not yet.)

"Wei Ying is good," he concludes, finally. "He is a friend to Herald Ingress, and to others here. He will give of himself to help where it is needed, even unasked. I trust him with everything I am, everything I have. You need have no concerns, Tom-qianbei."

"If you have questions. About what I have said. I will answer them."

He will cut himself open with the words and bleed, if doing so will spare Wei Ying pain.