Four Olds
Tui bei tu () is a Chinese prophecy book from the 7th-century Tang dynasty. The book is known for predicting the future of China, and is written by Li Chunfeng and Yuan Tiangang (袁天罡), and has been compared to the works of famous western prophet Nostradamus. Well known in Hong Kong, Macau and Taiwan, the book was previously banned in the People's Republic of China under the Communist party for superstition (one of the “Four Olds”), though it has since reappeared in street-side book stalls in the 1990s as a bestseller.