Is Zhang Shuming's calligraphy collectible?

Zhang Shuming is a member of China Calligraphers Association, a director of Sichuan Calligraphers Association and a member of the Creation Committee of Chengdu Calligraphers Association. His works won the National Award of the Fifth Book Fair and the Gold Award of the Second International Calligraphy Competition, and were awarded the title of 1999 Top 100 Excellent Calligraphers by the China Federation of Literary and Art Circles. His calligraphy works have high collection value.