Mao Collection, Upper Volume Radical: Heart (xīn) Character: xi Kangxi stroke count: 16 Page 402, Entry 24 In the Explaining Graphs and Analyzing Characters (Shuowen Jiezi), the character xi is also written in a variant form (xi). Additionally, the Dictionary Supplement (Zihui Bu) notes this as an ancient form of the character xi. For detailed annotations, see the Mouth radical, nine strokes.