History of Literature and Art says, "There are 21 articles in Huainan and 33 articles outside", and Yan Shigu notes, "There are 21 articles in existence today, which are probably the legacy of the original article. Its contents are as follows: Book I: Original Way Training Book II: Authenticity Training Book III: Astronomy Training Book IV: Falling Physical Training Book V: 00: 00: 00: 00:00:00:00:00:00:00:00:00:00: 00: 00: 00: 00: 00: 00: 00: 00: 00: 00: 00: 00: 00: 00