Mao Collection, Upper Volume Radical: Heart (xīn) Character: guai Kangxi stroke count: 10 Page 384, Entry 31 This is a common variant form of the character for strange. Yan Zhenqing, when studying the Praise of Dongfang Shuo (Dongfang Shuo Zan) by Wang Xizhi, wrote this character as guai to conform to the calligraphic standards of regular script. Consequently, the general public mistakenly began to write the radical as zai.