Literature Reference: 大道全生棘，中丁尽执殳。—— 《东南行一百韵寄通州元九侍御澧州李十一舍人果州崔二十二使君开州韦大员外庾三十二补阙杜十四拾遗李二十助教员外窦七校书》 The great roads are now overgrown with thorns, and the middle-aged men all carry spears. Source from 'A Hundred Rhymes on a Journey Southeast to Yuan Jiu, the Imperial Censor of Tongzhou, Li Shiyi, the Gentleman of Lizhou, Cui Twenty-two, the Envoy of Guozhou, Wei Dayuanwai, Yu Thirty-two, the Corrector, Du Shisi, the Reminder, Li Twenty, the Assistant Instructor, and Dou Qixiaoshu'.
中: Center, in the middle. When used in personal names, it also signifies a high status, notable achievements, as well as traits of honesty, integrity, and adherence to norms.
丁: The fourth of the twelve Heavenly Stems, also symbolizing population.
Meaning: The term 'Zhong Ding' refers to middle-aged men, symbolizing strength and responsibility.