What about the works of the painter Tang Jian? Is it collectible?

Tang Jian, 1965, a native of Zhucheng, Shandong. Professor, doctoral supervisor. He is currently the director and professor of the Exhibition Center of China Academy of Fine Arts; Member of China Artists Association and China Calligraphers Association; Professor of Shandong University, doctoral supervisor of painting and calligraphy aesthetics in China; Professor of China University of Political Science and Law, Visiting Professor of Art College of Shenzhen University, Executive Director of Peking University Art Education Society.