榆: The elm tree, with its evergreen foliage, stands tall and straight, embodying the spirit of unwavering resolve and robust vitality. Its seeds and flour are cherished in Chinese culture, symbolizing strength and prosperity.

乐: Happiness, joy. The character "Ji" is auspicious and signifies a carefree, cheerful, and comfortable life, often used in names to convey a sense of ease and contentment.