Is Sun Jizu's calligraphy and painting valuable?

Sun Jizu's calligraphy and painting are valuable, including not only economic value, but also cultural value. In the early years, there was a patriotic thought that "every man is responsible for the rise and fall of the world." When I was studying in Mongolian and Tibetan schools, I studied under Hu, a famous educator in the Republic of China, and worked hard to learn scientific and cultural knowledge and improve my comprehensive quality. At that time, it was the war years, and compatriots all over the country were suffering from the pain of losing their homes because of foreign invasion. Although they can only eat one meal a day, it doesn't affect his strong patriotism at all. At the age of 95, he still sticks to noble ideas and inherits his own calligraphy.