Is Zhang Guocheng's calligraphy valuable?

Worth some money. Zhang Guo's stage name: Jason, a native of Jiangyou, Sichuan, studied calligraphy with his grandfather since childhood. He first studied Yan Zhenqing's regular script and Huang Tingjian's cursive script, and also studied Han Wei Bei and Cliff Stone Carvings. His calligraphy is very valuable, generally at RMB/654.38+00,000 yuan/square foot. Zhang Guo is a member of Emeishan Artists Association, executive director of Mianyang Wushu Association, member of China Calligraphers Association and inheritor of intangible cultural heritage. He is proficient in martial arts and has created intangible projects such as impression Tai Chi and high-altitude calligraphy. He has been invited by CCTV and domestic and foreign large-scale artists for cultural performances and cultural exchanges for many times.