Yongming Yanshou ranks among the great figures of the Chinese and East Asian Buddhist tradition. His main work, the one-hundred fascicle Zongjing lu (Records of the Source-Mirror), is regularly cited but has been subjected to little systematic investigation. Through a vivid reconstruction of the environment in which Yanshou lived and wrote, Welter aims to prove that Yanshou's conception of Chan was a vital contribution to the determination of Chan's future direction. Welter also draws evidence from the Zongjing lu's record of Chan master's teaching fragments, an important but frequently overlooked early source. This book provides thorough documentation and analysis of the Chan master's teaching fragments in the Zongjing lu.