During the Sung dynasty (960-1279) a man named Han Yen-chih wrote the Chulu, or A Record of the Tangerine Orange, which details our characteristics, varieties, and methods of cultivation.
宋朝時，韓彥直還精心為我們著作專輯「橘錄」，詳記柑橘家族的特性、種類、栽培、貯藏等。