Zi Collection, Upper Volume Radical: Bamboo (zhú) Page 105, Entry 03 Pronounced wu (falling tone) — "Guangyun" Pronounced wei (falling tone) — "Jiyun" Same sound as wu (falling tone). Refers to black bamboo. Also pronounced mo (falling tone) — "Guangyun" Same sound as mu (falling tone). Refers to the black outer skin of bamboo.