Xu Zhongnan's calligraphy is free and easy, elegant and handsome. His works are all inscribed in running scripts or running scripts, but most of them are running scripts. Different from other famous artists in the same period, long questions are rarely found. Usually he writes a poem or two before leaving his name.
Common signatures are: Xu Chang, Xu Zhongnan, Julie, Zhou Nan, West Window of Zhushan Qibishan Pavilion.
Common seals are "Zhongnan", "Xu Shuoyin" and "Xu Yin Seal".