How much is the work of the famous calligrapher Li Haijian worth per square foot?

According to the auction data, the value of Mr. Li Haijian's works should be:

Department calligraphy international market 10000 USD/square foot; Domestic market 60000 yuan/square foot

Other works in the international market are $5,000 per square foot; Domestic market 30,000 yuan/square foot

I hope I can help you!