How much is a flat foot for Xu Shichang calligraphy and painting?

The President of the Republic of China was a celebrity painter and calligrapher, and Xu Shichang was a bureaucrat in the late Qing Dynasty and Beiyang government. Word Buwu, also known as Juren, Taozhai (known as Shuizhucun), a late Shuizhucun, and a scholar in the late Qing Dynasty, has a profound knowledge of traditional culture. At the same time, he is also engaged in the study of Chinese scholars' calligraphy and painting. His calligraphy is strong, smooth and free, and his general calligraphy works are 3,-4,/square foot, and his calligraphy and painting works are 4,-5,/square foot, which is more reasonable. Those who are really refined and new are more expensive.