Liaw Yun-Fan was once under the tutelage of Prof. Song Juei-Low. In the past, he taught at National Taiwan University and Taipei Veterans General Hospital before transferring to Chang Gung Hospital in 1976. With a microscope, camera equipment, and a -80 degree Celsius freezer for storing blood serum, he has so far preserved as many as 1 million serums from confirmed patients since 1977, thus establishing the importance of Linkou Chang Gung Memorial Hospital as a center of liver research in the country. Liaw became famous internationally for his work on “Chronic Lobular Hepatitis.” During the process, he and his student Chu Chia-Ming and British experts defined three new chronic hepatitis B terms-“Immune Tolerance Period,” “Immune Clearance Period,” and “Original Residual Zone.” His creation of these medical terms is engraved in the history of medicine, and affirmed his decades of efforts and dedication in the field of chronic hepatitis.