Because Wang Xizhi's greatest achievement is to increase and destroy the ancient law and turn the simple calligraphy style of Han and Wei dynasties into exquisite and beautiful calligraphy style. In a word, the introduction of Chinese character writing from practicality to the realm of paying attention to techniques and tastes is the awakening of calligraphy art, which indicates that calligraphers not only discover the beauty of calligraphy, but also can show it.
Studying hard, being good at collecting the strengths of various schools and being unique are the main reasons why Wang Xizhi became a book saint.