2. Qi, an ancient Chinese character, is a variant and a traditional Chinese character similar to "Cao" and "Cao". Now it is mostly used in calligraphy and seal cutting.
3. Kangxi Dictionary: Cao Yin. Shuowen? . Prison two? Yes In Tingdong, from? . Those who govern things, from yue. "Note" Xu Kai said: It is also necessary to rule the prison with words, so it is from Yue. In Notes on the History of Emperor Cheng in the Pre-Han Dynasty, there are four Cao's in the book, five Cao's in the emperor's mansion and three Cao's in the prison. The ancestors of the later Han Dynasty were divided into six Cao Cao.