Literature Reference: The virtuous gentleman, with sincerity in his heart, never forgets. Source from 'The Book of Songs: Xiao Ya·Gu Feng Zhi Shi·Gu Zhong'.
怀: Yearning and reminiscence, here signify family harmony and mutual care.
允: Promise, to permit. It metaphorically signifies honesty and trustworthiness, ensuring that every commitment is fulfilled.
Meaning: Huaiyun signifies a heart filled with sincerity, noble character, and trustworthiness.