 The collection includes mythic personages (e.g., Yellow Emperor and Pengzu who allegedly lived over 800 years), famous Daoists (Laozi and Yinxi the Guardian of the Pass), and historical figures (Anqi Sheng who instructed Qin Shi Huang (r. 247-220 BCE) and Dongfang Shuo the court jester for Emperor Wu of Han (r. 141–87 BCE)) (Penny 2008