牛: Mammalian, herbivorous. Often in names, it symbolizes robustness, tenacity, and diligent industriousness.
谦: Humble, modest, and gracious. Polite, with a deep understanding of etiquette.
Meaning: The character '牛' symbolizes diligence and steadfastness, while '谦' embodies humility and modesty, creating an impression of hard work and humility.