Is Li Kuchan's Chinese painting sketch eagle valuable?

Li Kuchan's Chinese painting sketch eagle textbook is very valuable. The average price of Li Kuchan's paintings of a flock of eagles or double eagles can reach 500,000-800,000 yuan/square foot, and ordinary works can buy 300,000-350,000 yuan/square foot. There are many masters of eagle painting in past dynasties in China, from Hui Zong in the Northern Song Dynasty to Lin Liang in the Ming Dynasty to the Eighth National Congress of the Qing Dynasty. In modern times, Hua Nie, Qi Baishi, Xu Beihong and others all have excellent works with the theme of "eagle". Li Kuchan's eagle is different from Liang Lin's ancient eagle, with the aloof of eight eagles, the cleverness of Hua Yan's eagle and the foolhardy of Qi Weng-ying, showing a heroic charm with strong symbolic significance.