C1420 Even If He Didn't Want to He Had to
Lou Lan was located under the Taklimakan Desert and had been exposed to the scorching sun all year round. This place was originally the most poisonous place in the world for sunlight.
In addition, there were seven suns in the underground Lou Lan. Whenever it was noon, the seven suns would form a line and bask Blackstone Mountain.
Because of this
