Introduction to Zhizhi Cave: Go west along the downhill circuit from the east courtyard of Jade Emperor Hall. There is a naturally formed cave on the side of the hillside. This cave is no more than one foot deep and less than four feet high. It is simple, simple, low and damp. The cave door is made of blue bricks. The stone plaque on the door is engraved with the three characters "Zhizhi Cave" in official script. "Zhizhi" comes from one of the Four Books. There is a sentence in "Knowing the Stop, and then being able to settle" in "The Great Learning", which means "only if you know where the highest realm of goodness is, can you pursue it persistently."