Pronounced hou gan (falling tone) in the "Tang Yun" (Tang Yun), and hou gan (falling tone) in the "Ji Yun" (Ji Yun), pronounced the same as "han". "Shuowen Jiezi" (Shuowen Jiezi) explains it as fine fur of wild animals. "Yupian" (Yupian) explains it as long fur. Also pronounced he gan (falling tone) in the "Ji Yun" (Ji Yun), pronounced the same as "han". The meaning is the same.