Chou Collection, Middle Volume Radical: Earth (tǔ) Entry: Yi Kangxi stroke count: 10 Page 229, Entry 11 Explication of the Six Writings (Liushugu): Same as yi. Book of Rites (Liji), Record of Great Mourning (Sangdaji): The field officer builds a furnace (yi) beneath the west wall. Commentary: The field officer takes earth from the west wall to form a block-shaped stove.