韓彥直 [ㄏㄢˊ ㄧㄢˋ ㄓˊ; han2 yan4 zhi2] Han Yanzhi (1131-?), Song dynasty botanist, author of classification of orange trees 橘錄[ㄐㄩˊ ㄌㄨˋ; ju2 lu4] ◄ ►