Introduction to Si Ruitang: Si Ruitang is located on the west side of Ruiguang Tower. It is said that in the second year of Yuanfeng in the Northern Song Dynasty (AD 1079), the eminent monk Yuanzhao held a lecture at Ruiguang Zen Monastery. The "four auspicious signs" of Qing Dynasty made the hall named "Four Auspicious Halls".