Which is better in the preface to the holy teachings?

Mitsui Ben and An Siyuan Ben are both good. I suggest you really go to the bookstore. There is a very practical note in regular script next to it.

The Preface to the Holy Teaching is called the Preface to the Holy Teaching in Tang Sanzang, which was written by Li Shimin, Emperor Taizong. It was originally written by Chu Suiliang, the four great calligraphers in the Tang Dynasty, and later carved into a tablet by Shaman Huairen from Wang Xizhi's handwriting, which is called "Preface to the Holy Teaching of Tang Youjun" and "Preface to the Book of Wang Xizhi Collected by Huairen".

In the history of calligraphy, The Preface to the Immortal Monument is almost a must-read for studying Wang Xizhi's running script. Preface to the Holy Teaching reproduces the artistic features of Wang Xizhi's calligraphy. It is a treasure house of Wang Xizhi's calligraphy, and there are many famous calligraphers who have studied the preface to the holy teachings in history. Now, famous historical figures from ancient and modern times are selected to copy holy decrees and exchange and learn.