Confucian thought, also called Confucianism, was established by Confucius, a great thinker and educator who live in the late Spring and Autumn Period (770BC-476BC). Some representatives of Confucianism throughout Chinese history include Mencius, Dong Zhongshu, Zhu Xi, and Wang Yangming. The main classics of Confucianism are the Four Books (The Great Learning, The Doctrine of the Mean, The Analects of Confucius, and Mencius) and the Five Classics (Zhouyi, Shangshu (collection of Ancient Texts), The Book of Songs, The Rites, and The Spring and Autumn Annals). The Confucian school regards “benevolence, righteousness, propriety, wisdom and fidelity” as being at the core of its ethical system. Confucianism was the main ideology of feudal society for more than 2,000 years in China.