Literature Reference: 历难求试，执宪成风。四镇咸乂，三阶以融。—— 《前相国赞皇公早葺平泉山居𫏐还憩旋起赴诏命作镇浙右輙抒怀赋四言诗十四首奉寄 三》 Through trials and tribulations, upholding the law became a custom. The four regions were all in order, and the three realms were in harmony. Source from 'Fourteen Four-Character Poems to the Former Prime Minister Zanhuang Duke'.
四: Numbers and numerals.
镇: Peace and stability. In names, it often conveys a sense of confident and composed problem-solving, clear thinking, and the wish for smooth and successful endeavors.
Meaning: The four regions symbolize peace and stability, representing harmony in the world.