Why can Preface to Lanting Collection be called the pinnacle of China's calligraphy art?

First of all, from the perspective of calligraphy itself, during the Jin Dynasty, due to the influence of gentry advocating Huang Lao and speaking freely, the calligraphy style gradually changed to pay more attention to brushwork and charm; Judging from the characteristics of running script, it is more in line with the character of Wei and Jin Dynasties. Therefore, the running script is the most prosperous calligraphy in Jin Dynasty and the highest achievement in China's calligraphy history. Now there is only a copy, but the whole text is light and ethereal, natural and natural, and there is no trace of carving. This preface to Lanting Collection is a font between regular script and cursive script. Wang Xizhi's real cursive script was praised by Emperor Taizong (the original script refers to the transitional regular script from Han and Wei Dynasties to Sui and Tang Dynasties, characterized by official script in regular script), and later calligraphers also praised it as "the first running script". Moreover, Wang Xizhi himself was once rated as the saint of cursive script and calligraphy, and his masterpiece "Preface to Lanting" is called the pinnacle of China national calligraphy art.