Lan Wangji has a firm grip with his hands, fingers lacing, and locking. When he's getting too close to the water edge, understanding his request, he gently pulls him toward the edge of the pool.

He picks the side and edge of the pool where it's not particularly deep, only shallow by three feet, so it's low enough to dip his bare feet into the pool while sitting by the edge.

Lan Wangji will help him with that, slowly and carefully, so Wei Wuxian wouldn't slip or fall.