A Selected Collection of the Great Learning, the Analects, the Doctrine of the Mean and Mencius, as a set of Chinese Sages Series, are compiled to introduce the essence of traditional Chinese culture to the world. These four books began to show their splendors as early as over 2400 years ago between the Spring and Autumn and the Warring States Periods. Now they are published in classical-modern Chinese and English versions as a help to people of interest to know the basic ideas of Confucianism.