The outside part. According to the data of Zhuangzi, Sheng Da, Tiandao and Zhile are selected from Zhuangzi Waipian, with the title of "Heaven and Earth" at the beginning. The whole article consists of fourteen articles, mostly focusing on inaction, which represents Zhuangzi's philosophy of technology. Zhuangzi, also known as Nanhuajing, is a summary of Taoist thought by Zhuangzi and his later scholars in the middle and late Warring States Period.