Zheng Banqiao, one of the "Eight Eccentrics of Yangzhou", a painter and writer in Qing Dynasty, wrote a health couplet: "Brown rice with green vegetables and radish, chrysanthemum tea with crock well water." The All-China Federation vividly summed up Zheng Banqiao's health-preserving experience: he often eats coarse grains and drinks natural water, and a light diet is good for his health.