Literature Reference: 四知台上镜，三惑井中瓶。—— 《分司东都寓居履道叨承川尹刘侍郎大夫恩知上四十韵》 The mirror on the Si Zhi platform and the bottle in the San Huo well. From 'Fen Si Dong Du Yu Ju Lu Dao Dao Cheng Chuan Yin Liu Shi Lang Da Fu En Zhi Shang Si Shi Yun'.
四: Numbers and numerals.
知: Aware, enlightened. In names, it often signifies erudition, intelligence, and talent, embodying the notion of vast knowledge and wisdom.
Meaning: Si Zhi refers to heaven knowing, earth knowing, you knowing, and me knowing, symbolizing integrity, honesty, and self-discipline.