As long Wei Wuxian is having fun, Lan Wangji will sink further, enjoying the warm water and weather. He can't recall the last time he enjoys beach like weather. He never ventured out of Cloud Recesses and only goes out to other towns on night hunts or on sect business.

When Wei Wuxian approaches him.

"I didn't know you can swim. But the water is warm and nice. I'm glad you can see it."