Zi Collection, Upper Volume, Page 10, Entry 03 Pronounced tu (falling tone) — "Tang Yun" (Tang Yun) and "Ji Yun" (Ji Yun) record: Pronounced tu (falling tone), same pronunciation as "tou". Refers to a round grass mat. "Lei Pian" (Lei Pian) explains it as a seat made of grass. Additionally, "Ji Yun" (Ji Yun) records: It is also the name of a type of grass.