Confucianism is the religion based on the teachings of Confucius, a Chinese philosopher who died c. 479 BC. A state religion from 100 BC to about AD 1900s, the tenets of Confucianism stress the importance of high moral ideas and noble political beliefs. It emphasizes respect for ancestors and places high premium on civic duties. Confucian scriptures known as the Five Classics and Four Books served as the foundation of the Chinese educational system for ages. Confucianism, at present, enjoys a mainland religion status in China ever since the communist government revised its policy on religion in the 1970s.