Is Xu Shaoqian's calligraphy of high value?

Tall man. Mr. Xu Shaoqian engaged in calligraphy activities after retirement, so Xu Shaoqian's calligraphy is of great value. He is currently the president of Beijing Du Jun Painting and Calligraphy Institute, the president of Beijing Tianshoushan Painting and Calligraphy Institute, the member of China Bangshu Calligraphers Association, the member of Laozi Calligraphy Association and the secretary general of Xishan Painting and Calligraphy Institute. He has made great achievements in calligraphy and has a high collection value.