  The second book is a supplement to the first. The supplement (Qian jin yi fang 千金翼方, printed in 682) records some thirty years of Sun’s own experience with special attention to folk remedies. It adds some eight hundred recipes, with details on collection and preparation for two hundred. Some are new herbs, including herbs from India. It also refers to many mystical and magical practices, including exorcisms, talismans, incantations and descriptions of acumoxa points effective against demons.