How much is a flat foot of Liu Shengli's calligraphy and painting?

Liu Shengli is currently the vice president of China Classical Calligraphy and Painting Research Institute, a distinguished artist of the State Council State Guest Gifts, a national first-class artist, a first-class calligrapher of the World Culture and Art Association, and a national authoritative department. Longge: RMB 1.5 million per square foot was rated as the favorite artist in China. Now that prices have gone up, they will only get higher and higher in the future.