Does Wang Xianzhi's codex belong to Preface to Lanting?

Don't belong. Wang Xianzhi's Preface to Lanting is one of the calligraphy works that have been copied a lot since the Tang Dynasty. This copy is copied for learning calligraphy, and the brushwork and ink color are different from the original, which has high artistic value. However, this manuscript is not the original, nor is it a work created by Wang Xianzhi himself, so Wang Xianzhi's manuscript is not the manuscript of Preface to Lanting.