Introduction to the Moon Palace Gate: There is a Moon Palace Gate at the end of the courtyard, with a diameter of 2.36 meters. There is a brick plaque on the north and south sides of the top. The south side has the inscription "Teng Jiao Qi Feng", which is the literary examination room; the north side has the inscription "Purple Lightning Green Frost". For the martial arts examination room. The books on the north and south sides are all in large official script.