Zheng Qingcang (indomitable spirit, man's true colors) (from the Song Dynasty poet Su Shi's "Hunting in Jiangchengzi Mizhou", ... left to lead the yellow, right to hold the green ...)
Zheng (knowledgeable)
Zheng Junxi (Jun: tall and mighty; Xi: The future is bright)
Zheng (wisdom; Wisdom Chen; The pronoun of ancient kings)