It means that using copper as a mirror can tidy up a person's clothes; Taking history as a mirror, we can know the ups and downs in history; Taking others as a mirror, you can know your daily gains and losses. \r\n "Take history as a mirror to know the rise and fall; People-oriented, you can know the gains and losses "from the old Tang book" Biography of Wei Zhi ". \ r \ n \ r \ Biography of Wei Zhi in the Old Tang Dynasty: In the seventeenth year of Zhenguan in the Tang Dynasty (AD 643), Wei Zhi died of illness. Emperor Taizong was very sad. He said with tears: "husband, with copper as a mirror, you can dress well;" Taking history as a mirror, we can know the rise and fall; Take people as a mirror, you can know the gains and losses. If Wei Zhi doesn't, I will die like a mirror! " \ r \ nA A person can see whether his clothes and hat are properly dressed by using copper as a mirror; Taking history as a mirror, we can know the reasons for the rise and fall of the country; Looking at people as a mirror, you can find your own right and wrong. After Kevin·Z died, I lost a good mirror! This is the highest evaluation of Wei Zhi's life value.