Couplets are treasures of Chinese national culture. Literati from past dynasties wrote poems and couplets during their interactions with each other, expressing their ambitions and interests, encouraging progress, or advocating diligence and honesty, which had an inspiring and warning effect on future generations.

Ren Huan, a literati in the Ming Dynasty, wrote an inspirational couplet by himself: "Feed the vastness of the sea and the height of the sky, and cultivate a heart that worries first and is happy later." This couplet is regarded as an inspirational motto by the world. It tells people that people must have noble sentiments and a broad mind, be patriotic and love the people, and have a life philosophy of worrying first and then rejoicing.

When Yang Shiqi, the Minister of War in the Ming Dynasty, learned that his son was roaming the countryside and arousing hatred from the people, he was heartbroken and wrote a couplet: "I am not afraid of thousands of lawsuits, but I am afraid of three-inch knives by the villagers." This is a warning. Son, the people's will must not be insulted, public opinion must not be violated, and the people must be loved and cared for. This couplet is concise and comprehensive, with profound implications. It was evaluated as "the medicinal stone of the family" by Liang Zhangju, a master of couplets in the Qing Dynasty, which shows its high taste.

Also in the Ming Dynasty, a county magistrate who was about to take office in a county government office in Wuxi, Jiangsu Province, cleverly disguised himself as a teacher and inscribed a police couplet on the screen wall, ceremonial gate, and lobby of his government office: "Treat the people as such. Injury, all the people in Xiyi are my sons; cultivate yourself with respect, Senior Donglin is my teacher." "Workers are comparable to officials. They carry axes and sharp blades with them and use them according to their talents; medicine can be used as a metaphor for politics, and strong doses of salt and sulfur are sometimes used. "How about seeing a doctor?" "Everyone talks about merit and fame. There is real merit and real name. It is useless to have a little selfishness to hide one's ears and steal the bell. When officials call parents, the father must be the real father and the mother must be the real mother. Do a few hangings. The lie of selling sheep to dogs is irrelevant.”

Dai Yuanshan, a talented man from the Qing Dynasty, gave a couplet to a friend when he sent his friend to Yunnan for his appointment: "It is only when poetry can be put into painting that it is said to be wonderful, and when an official is poor, it is Qing." The first couplet uses poetic and picturesque pen and ink to tell people how to recite poetry and paint. What's wonderful is that the second line of the second line takes a twist and turns, and points out the way to be an official to the point. This couplet has a clever twist and a concise statement with profound meaning. It has become a classic saying.