Chu Hsi's key position in Sung-Ming Neo-Confucianism is related to his effort to establish the orthodox line of transmission of the Way (Tao-t'ung). In the famous Preface to his Commentary on the Doctrine of the Mean, he traced the line back to ancient sage-emperors, Confucius and Mencius, then to Sung Neo- Confucians. He and his friend Lü Tsu-ch'ien compiled the Neo-Confucian Anthology: Reflections on Things at Hand in which he established the lineage of Lien (Chou Lien-hsi), Lo (Ch'eng Ming-tao and Ch'eng I-chuan), Kuan (Chang Heng-chü), and Min (himself). The posterity accepted this lineage but gave different interpretations. In the Ming dynasty, Wang Yang-ming promoted his teachings of extending innate knowledge of the good (liang-chih), and Liu Chishan his teachings of sincerity of the will and keeping vigilance in solitude. The contemporary Neo-Confucianism continued this line, gave Chu Hsi's ”li-i-fenshu” (one principle, many manifestations) totally new interpretations to face the challenge of developing a global ethic in the 21st century and the new millennium.