Shen Collection, Upper Volume Radical: Grass (cǎo) Zi Kangxi stroke count: 15 Page 1045, Entry 03 Correct Orthography (Zhengzitong) states this is the original form of the character for zī. According to the Explaining Graphs and Analyzing Characters (Shuowen), it is composed of the radicals for grass and field. According to the Jade Chapters (Yupian) and the Broad Rimes (Guangyun), it is composed of the radical for stream.