Shen Collection, Upper Volume Radical: Grass (cǎo) Die Kangxi Strokes: 12 Page 1031, Entry 04 Pronounced zhi (rising tone). Erya, Explanation of Plants (Erya): Bei is known as die-shu. Commentary: Die-shu is Schisandra chinensis (wuweizi). Materia Medica Commentary: Baopuzi states: The five flavors are the essence of the five elements; its fruit possesses all five flavors. Also, the name of a tree. Book of Odes (Shijing), Odes of Tang: On the mountain there are shu trees. Commentary: Shu is die. It is the modern thorny elm. Also, according to the Guangya (an ancient dictionary), niu-die is Achyranthes bidentata (niuxi). Also pronounced die. The meaning is the same.