 A renowned teacher in later life, Zhu taught the classics and Neo-Confucian thought and practice to hundreds if not thousands of students. His oral discourses and discussions are preserved in the Classified Dialogues of Master Zhu (Zhuzi yulei), and his poetry, essays, correspondence, and other prose works are collected in the Collected Works of Master Zhu (Zhuzi wenji). He also published critical, annotated editions of several classics, including the Book of Change (Yijing) and the Book of Odes (Shijing), essential works of Neo-Confucianism, including by Zhou Dunyi, Zhang Zai, and the Cheng brothers, and a vital Neo-Confucian anthology, Reflections on Things at Hand (Jinsilu). He also edited and annotated an important early text of inner alchemy Daoism; the Cantong qi (Unity of the Three) by Wei Boyang (3rd cent. CE), which combines the cosmology of the Yijing and the Daoist teaching of wuwei (non-intentional action) with inner alchemy. Zhu Xi remained devoted to his spiritual and intellectual work virtually to his last breath, pondering and discussing problematic passages in the Great Learning during the last several days of his life. Throughout his life, Zhu Xi sought to reestablish the fundamental concepts and values of Confucianism to restore China’s cultural and political integrity as a Confucian society, especially since people in search of spiritual guidance and solace were increasingly looking to Daoism and Buddhism rather than Confucianism, which was perceived as a state ideology and orthodoxy and had lost spiritual and ethical purchase. Moreover, Zhu believed that the empire needed the spiritual élan of Confucius’ original ethical ideas and values to meet the challenge of barbarian encroachments. His own sincere patriotism, commitment to the tradition, and devotion to learning and scholarship have remained an inspiration to this day in East Asia and throughout the world.