Do-Hwa, his courtesy name Sang-Moon and a pen name Chul-Ahm, wrote 『Sang-Han-Yook-Suh』 in Myoung period. Born in 1369 in the area of Yuh Hang, he passed away at the age of 95 in 1453. He pitied the fact that doctors in those days relied only on 『Sang-Han-Ron』(a book reedited by Wang-Sook-Hwa) without any distinguishing standards in treatment. So he reorganized the diagnosis, treatment, theory, and prescription of diseases affected by the cold and wrote 『Sang-Han-Yook-Suh』in 1445 in hope for his clinical experiences to be passed on to the future generation. 『Sang-Han-Yook-Suh』 is composed of six volumes-「Sang-Han-Swae-Un」,「Sang-Han-Ga-Bi-Juhk-Bon」, 「Sahl-Cha-Choo-Bub」, 「Il-Je-Keum」, 「Chul-Kang-Mang」, and 「Myoung-Ri-Sok-Ron」 『Sang-Han-Yook-Suh』 was a big influence to the 『Eu-Hak-Ib-Moon』 by Lee-Chun in Myoung period in the part where it covered the diseases by cold. And considering that the same part of 『Dong-Eu-Bo-Gam』 by Huh-Jun from the Chosun dynasty referred to the 『Eu-Hak-Ib-Moon』 a lot, it is an inevitable fact that 『Sang-Han-Yook-Suh』 is a critical book in medicine today in studying the diseases derived from the cold.