On the banks of the ancient Song River outside the south gate of Shangqiu Ancient City, Henan Province, there is a scenery. This is the true pen of the famous calligrapher Yan Zhenqing. The full name of the Baguanzhai is "There is a Tang and Songzhou official residence Baguanzhai Association Report Deji", the Balingshi Building, standing in the Tang Dynasty Zongda calendar for seven years (772).