Introduction to the Pearl Relic Building: It was discovered in the Heavenly Palace on the third floor of the Ruiguang Temple Pagoda in Suzhou in 1978 and stored in two wooden boxes. On the front of the black outer wooden letter are two lines of white lacquered regular script that read "The Pearl Relic Building in the Third Floor Pagoda of Ruixingyuan". The four walls of the inner letter are painted with paintings of the Four Heavenly Kings, and the inscriptions written in ink on the inner wall include "Du Lu was involved in Fang Yunsheng's wife Sun's Shi Niang" and "Diary of April 18, the sixth year of Dazhong Xiangfu", proving that it is a relic of the Northern Song Dynasty. The main part of the treasure building is made of nanmu and is divided into three parts: Xumi Zuo, Zhuang Hall and Temple.