《韩非子》中记载:齐恒公喜欢穿紫色的衣服。于是“一图尽服紫。”从而引起了齐国紫服价格暴涨,使五件素服的价格,也抵不上一件紫服。齐桓公为此感到很优虑。便向管仲请教对策。管仲说:《诗经》有言,“不躬不亲,遮民不信。”大王想纠正这股风气,何不从你自己开始不穿紫服呢?齐桓公欣然接受了管仲的建议,首先自己不再穿紫服,并对穿紫服来见他的人不客气地说:离我远点,我讨厌穿紫服的。结果当天朝廓里再没人穿紫服了,第二天都城中没人穿紫服了,第三天全国老百姓再没有穿紫服的了。由此看来,齐国服紫之风的盛与衰,与齐桓公的实际行动密切相关。即所谓“上行下效,上有所好,不 ”Han Feizi“ records: Qi Henggong likes to wear purple clothes. So ”a picture to serve purple.“ This led to Qi Guo Zifu prices soared, so that the price of five plain clothes, can not match a purple suit. Qi Tonggong was very satisfied with this. Then he consulted with Guan Zhong. Guan Zhong said: ”The Book of Songs“ has something to say, ”I don’t care about my neighbors, I don’t believe people.“ The king wanted to correct this atmosphere. Why not start from your own and not wear purple clothes? Qi Jungong gladly accepted Guan Zhong’s suggestion. First of all, He no longer wears purple clothes, and he politely said to those who came to see him in purple suit: I am far from me and hate to wear purple clothes. As a result, no one wore purple clothes in the Chao Khokri that day. No one in the city had purple clothing the next day. On the third day, the people of the country did not wear purple clothes. From this point of view, the prosperity and decline of Qi Feng’s purple dress is closely related to the actual actions of Qi Qigong. That is, the so-called ”upstream effect" is better, not