Introduction to the calligraphy and painting exhibition hall on the fourth floor: The calligraphy and painting exhibition hall on the fourth floor is divided into two basic displays: "Exhibition of Calligraphy and Painting Works Donated by Mr. Xu Bopu" and "Exhibition of Modern Calligraphy and Painting Works from Huai'an Collection". The 110 paintings and calligraphy works donated by Mr. Xu Bopu include the authentic works of 48 famous modern and contemporary artists such as Yu Youren, Zhang Daqian, Xu Beihong, and Qi Baishi, all of which are rare art treasures.