What is holy teaching calligraphy?

the preface to the holy teachings is the preface to the holy teachings of Sanzang in Datang, written by Emperor Taizong. It was first written by Chu Suiliang, one of the four great calligraphers in the early Tang Dynasty, and later collected characters from Wang Xizhi's calligraphy by Shaman Huairen and carved them into inscriptions, which completely reproduced the artistic characteristics of Wang Xizhi's calligraphy and became a treasure house of Wang Zi.