Hai Collection, Upper Volume Radical: Horse (mǎ) Entry: Shan Kangxi stroke count: 20 Page 1443, Entry 01 Correct Character Compilation (Zhengzitong): Pronounced shan. To castrate. Manual of the Emaciated Immortal (Quxian Zhouhou Jing): Castrated horse, castrated ox, castrated ram, castrated pig, castrated rooster, castrated dog, castrated cat. Also, grafting a tree is called shan (to castrate). Extended Meaning of Monthly Ordinances (Yueling Guangyi): There is a method for grafting trees. Also written as a variant form (shan). History of the Five Dynasties (Wudai Shi), Biography of Guo Chongtao: Said to Jiji: One should entirely remove the eunuchs; as for a castrated horse, it also must not be ridden.