Introduction to Zhang Gongfu Di: The four characters of Zhang Gongfu Di were written by Mr. Wu Zhongqi, a famous calligrapher in Jiangsu. Zhanggongdong has been a place for Taoist practice for many years. Taoists divide the famous fairy caves into ten major caves, thirty-six small caves, and seventy-two blessed places. Zhanggongdong is one of the seventy-two blessed places. The Taoist book "The White Turtle Sutra" says: "There are seventy-two blessed places in the world, this one is fifty-eight, and Gengsang Gong rules it."