"Though he had memorized a volume of telegram numbers, he did not feel at ease, and wanted to find something that would let him learn his own value," is how reporter Huang, Zheng's old friend, describes him.
「儘管一本電報號碼背得滾瓜爛熟，卻總是心理不自在，想要找尋能認識自己價值的位置所在」，他的好友黃世宏這樣形容他。