Wu Collection, Lower Volume Radical: Stone (shí) Character: Zhen Kangxi Strokes: 14 Page 833, Entry 14 Zhengzitong says it is the same as zhen (anvil). Also, according to Jiyun, pronounced han. Zhen describes the shape of a mountain. Zuo Si, Wei Capital Rhapsody (Wei du fu): The Heng and Jie mountains rise like anvils against the blue sky. Note: Tang dynasty Bencao Shiyi (Compendium of Materia Medica supplements) by Zang Qi mentions the thunderbolt anvil, which is said to be produced in the mountains and marshes of Leizhou and Hedong, and is obtained after a lightning strike. Zhengzitong writes it as a variant form.