Introduction to the Hairpin Hall: In front of the Wenyou Platform is the Hairpin Hall, with "Qin Postal Posts" embedded on the four walls. It is the collection of Zhaolong, the magistrate of Gaoyou during the Jiaqing period of the Qing Dynasty. The calligraphy of Dong Qichang and other famous calligraphers was carved by the famous epigrapher Qian Yong. It has high artistic value.