古北界 Traditional form: 古北界 Pinyin (reading): Gǔběijiè Definitions: Palearctic realm Characters: 古 - old, classic, ancient 北 - north; northern; northward 界 - boundary, limit; domain; society, the world Traditional characters: 古 - old, classic, ancient 北 - north; northern; northward 界 - boundary, limit; domain; society, the world