How much is a Qingshan Xu calligrapher per square meter?

It should be 20000 yuan/square foot. Sometimes the transaction price will be lower. There are reports that. At present, the price of Ouyang's calligraphy works is 40,000/square foot, Zhang Hai's 30,000/square foot and Liu Yi's 20,000/square foot. In 2009, the market price of Shen Peng and Ouyang Zhongshi's calligraphy was only 1000 yuan/square foot, while the market price of Zhang Hai and Liu Yi was about 5,000 yuan/square foot.