Mr. Si's explanation

Teacher Si's explanation (1). Song Xie, You Zuo and Lu Dalin are all disciples of Cheng Yi, collectively known as "Mr. Si". See Xie's Biography of Taoism in Song Dynasty. (2) Cui Bi and Chen Tian were born in the Reform Movement of 1898 in the Song Dynasty, and Zhou Tian and Li Yong were born in Shanghai, both of whom lived in Yingchang Foreign House. All four of them are opposed to Ning's political reform and collectively called Mr. Wu. See Zhang Bangji's Random Records of Mo Zhuang in Song Dynasty, Volume 4.

Word decomposition

The interpretation of four is four names, three plus one (the word "four" is often capitalized on banknotes and documents): four sides. All around. Four orders (namely "four seasons"). Four bodies (a. refers to human limbs; B refers to four fonts: regular script, cursive script, official script and seal script). Si ku (four ancient books: synonymous with classics, history, books and collections). Also known as "four"). Mr. Sijunzi's explanation is generally a habitual courtesy title used after a man's surname. When talking with Mr. Du, he said that other people's husbands or people who claimed to be husbands used to be called accountants in commercial companies. In the old society, they were once called fortune tellers, fortune tellers, fortune tellers, geomantic omen, etc. As their profession.