Literature Reference: 《张常侍相访》 —— 作者：白居易 A Visit from Zhang Changshi — by Bai Juyi
张: The character derives from fire, aiding in the flourishing of one's auspicious deity. It signifies exuberance and bold expression.
常: Ordinary; common. Describing people and things that stand out, distinct from the ordinary.
Meaning: Zhang Chang signifies enduring and unchanging, symbolizing resilience and steadfastness.