History of FM Forensic medicine in china In the third century bc Xi Yuan Ji Lu written by Song Ci(1186-1249) the first systematic book on forensic medicine in history The proverb: Everything may depend on the difference between two hairsHistory of FM Forensic Medicine in China • In the third century BC • Xi Yuan Ji Lu written by Song Ci (1186-1249) -- the first systematic book on forensic medicine in history • The proverb: "Everything may depend on the difference between two hairs