Introduction to Qifeng Hanging Moon: Fifteen miles north of Zushan, there is a gate on the top of the stone wall, which is more than ten feet high and five or six feet wide. The stone cliff on the east side is thousands of feet tall. There is a huge cave on the cliff here that penetrates the sky, which is called "Cave Mountain"; because the cave is like a full moon, it is also called "Qifeng Hanging Moon".