三清
Ancient Chinese Daoism, ancestor worship, and foreign-originated Buddhism were the most prominent religious practices in the Song period. Daoism developed largely from the teachings of the "Daodejing", attributed to the 6th century BC philosopher Laozi ("Old Master"), considered one of the Three Pure Ones (the prime deities of Daoism). Buddhism in China, introduced by Yuezhi, Persian, and Kushan missionaries in the first and second centuries, gradually became more native in character and was transformed into distinct Chinese Buddhism.