Qian Yi (about 1032 A.D.-1117 A.D.) was a famous ancient Chinese Pediatric doctor. He was known for Lu Xin Fang, a pediatric work on Fonticuli Cranii. And then he was well-known for his specialism in pediatrics. Since he practiced medicine for many years, he had accumulated abundant clinical experience. There were many works in his life such as a collective of five volumes of Treatise on Cold induced Febrile Diseases, hundred articles about Treatise on infants and children, eight volumes on Qian’s prescriptions for children, and three volumes of Key to Therapeutics of Children's Diseases. All the other books were lost except the book named Key to Therapeutics of Children's Diseases.