Some of the Chinese mythology in the film is based on actual history. Lo Pan is a famous legend in Chinese history. He was a "shadow emperor"[7] appointed by the First Emperor Qin Shi Huang. Lo Pan was put on the throne as an impersonator because the Emperor was afraid of being assassinated. However, Lo Pan tried to take over and was cursed by the Emperor to exist without flesh for 2,000 years until he could marry a girl with green eyes.[7] Egg Shen defines "difficulty at the beginning" which is a hexagram from the Book of Changes or I Ching. Lo Pan is the name of the compass used for geomancy or feng shui. It literally means everything bowl – the device that reveals the secrets of the universe. There are also several allusions – and even earthly representations – of several elements from Diyu, the Chinese depiction of Hell.[perlu rujukan]