Mao Collection, Middle Volume Radical: Hand (shǒu) Entry: Tu Kangxi strokes: 13 Page 444, Entry 04 Tang Rhymes (Tangyun) and Rhyme Collection (Yunhui): Pronounced tu. Collected Rhymes (Jiyun): Pronounced tu, sounds the same as tu (plunging tone). Tangtu means to touch or collide. It is also used interchangeably with the expression tangtu (to be rude or abrupt). Correct Dictionary (Zhengzitong): Although tu and tu are generally interchangeable, and the term tangtu may be written with either character, the term for a chimney cannot use the character tu. The annotations in the Correct Rhymes (Zhengyun) are imprecise in this regard.