What is the theme of the early Taoist classic Taiping Jing?

The Taiping Jing presented by Zhang Jiao is the Taiping Qing Ling Shu handed down by Yu Ji, an alchemist in Shun Di in the Eastern Han Dynasty. Before that, when the Western Han Dynasty became emperor, Gan Zhongke, a neat man, passed Bao Liyuan, the heavenly official of the Taiping Classic. Gan Shu no longer exists today, but the ideological content of the two parts before and after Tai Ping Jing is similar, and there should be a relationship of origin and inheritance. The original book of Taiping Jing 170. Today, there are 67 volumes, which are collected in Taoist collections. The main idea of this book is the theory of the unity of heaven, earth and man. The book constitutes a complex theoretical system with the belief in immortals, the practice of cultivating immortals and the design of a peaceful and ideal society. Zhang Jiao used the idea of Taiping Jing to promote the secret technique of cultivating immortals and cure diseases with water spells. It also advocates egalitarianism with the concept of a peaceful and happy world and opposes the accumulation of property that does not help the poor, so it is deeply welcomed by the lower classes. In A.D. 184, based on Taiping Island organization, Zhang Jiao launched a massive Yellow Scarf Uprising, which disintegrated the Eastern Han regime.