What is the value of Zhu Hongcheng's calligraphy and painting?

Zhu Hongcheng's calligraphy and painting are of great value. According to the relevant information, Zhu Hongcheng, 1942, is from Binhai, Jiangsu. Member of China Calligraphers Association, member of China Coal Mine Calligraphers Association, director of Ningxia Helan Printing Society, part-time painter of Shizuishan Painting and Calligraphy Institute, and vice chairman of Shizuishan Old People Painting and Calligraphy Association. His calligraphy and painting collection is extremely precious.