Where can I see the Preface to Lanting in Charlie?

Iqiyi. The Lanting Preface is jointly invested and produced by iQiyi Network Studio, and the video rights, communication rights and broadcasting rights are all owned by iQiyi Video. The Preface to Lanting is called "the first book in the world", and people who study calligraphy are familiar with it, but calligraphers think that the Preface to Lanting is the most difficult to be familiar with among many Copybook for calligraphy.