Lan Zhan is indeed on board on the train. When the train arrives on the platform, this scenario is familiar. Months ago, he was on the very same platform, boarding the train with Wei Wuxian.

After Wei Wuxian picked him up from the platform, as soon he is informed, he went to go see him. He doesn't want to appear to look rushed. With a hand tucked behind his back, keeping up a calm exterior that Lan Wangji was known for back home. He took note that he's wearing a purple uniform and was sorted to be on team purple. "A-Yuan..?" With all the concern a father has, the boy he raised as his own son, and adopted into the Lan clan.

"A-Yuan, you are here. Did you recently arrived? Are you well?"