Mao Collection, Lower Volume Radical: Tapping (pū) 7 strokes Page 468, Entry 11 Pronounced gai (falling tone) Shuowen Jiezi (Dictionary of Explanations and Analyses of Characters): To change. Note: Li Yangbing states that when one has a fault, the action of tapping (pū) rectifies it. Five Classics Characters (Wujing Wenzi): Derived from the character for the sixth heavenly stem (yǐ). Book of Changes (Yijing): If one has a fault, then change. Also, in the Well hexagram: Change the city but do not change the well. Also a surname. Guangyun (Broad Rhymes): During the Qin dynasty, there was an official named Gai Chan. Also, in Rime Supplements (Yunbu): Rhymes with the sound qi (rising tone). Zhang Heng, Ode on Thoughts (Si Fu): I sink into private sorrows and deep reflections, my thoughts are chaotic and disordered. I wish to exert my strength to uphold integrity, though I am impoverished, I shall not change. Shuowen Jiezi (Dictionary of Explanations and Analyses of Characters): Formed with the tapping radical (pū).