Is Zhang Daxi's calligraphy valuable?

Worth some money. Zhang Daxi is an accomplished calligrapher. His calligraphy works have unique artistic style and characteristics, and have high artistic value. Calligraphy works record historical events, people, culture and other information at that time, and have precious historical value. Calligraphy is an important part of China traditional culture. Zhang Daxi's calligraphy works represent the essence of China traditional culture and have profound cultural value. So Zhang Daxi's calligraphy is valuable.