Zhang Tonghua's calligraphy is very valuable. Mr. Zhang Tonghua, a famous Chinese and foreign painter, has gone to 36 countries to engage in the exchange of painting and calligraphy. He cares about fame and fortune, is sincere, and takes calligraphy and painting as his friends. Its exquisite handwriting, rigorous structure and unique style, about 5,000 square meters, show the preciousness of Zhang Tonghua's calligraphy.