Modest bamboo has curved leaves, and proud plums are not spent on its back. This sentence comes from Zheng Xie's Zhu Meitu Couplet. Zheng Xie was a famous painter and writer in Qing Dynasty, with vivid words and famous Banqiao.
Nothing can be achieved with humility, but nothing can be achieved with complacency. This sentence comes from Chen Shou's "History of the Three Kingdoms", which is a famous historian Chen Shou's famous saying during the Three Kingdoms period and the Western Jin Dynasty.