Introduction to the caisson of Longfu Temple in Beijing: Longfu Temple was built in the third year of Jingtai in the Ming Dynasty (1452). It was built by Zhu Qiyu, the emperor of the Ming Dynasty. It was overhauled in the first year of Yongzheng in the Qing Dynasty (1723). In 1976, the caisson was removed from the Zhengjue Hall due to an earthquake. In 1989, it was moved to Xiannongtan for collection and restored in 1995.