Chou Collection, Middle Volume Radical: Earth (tǔ) Entry: Di Kangxi stroke count: 10 Page 229, Entry 27 Yu Pian (Jade Chapters) states that this is an ancient form of the character for earth. Detailed annotation is found in the three-stroke section. Former Han (Qian Han), Biography of Zhao Chongguo: Commanding them not to return to the fertile earth. According to the Classified Chapters (Leipian), it is said that the character was created by Empress Wu Zetian of the Tang Dynasty, but this assertion is incorrect.