Introduction to the Royal Book Building: The Royal Book Building is located in the south of Yuwang Temple, covering an area of ​​about 230 square meters. It was built to commemorate the emperor's writing and hanging of royal books. The plaque in the middle with "Made in Heluo" was inscribed by the emperor in the 33rd year of Kangxi (1694) and hung in this building. On the Imperial Library Building are the statues of Emperors Kangxi and Qianlong of the Qing Dynasty.