The four sentences of Hengqu refer to Zhang Zai's famous saying in the Northern Song Dynasty, that is, "Make a heart for heaven and earth, make a life for the people, link the past with the future, and make the world peaceful". Feng Youlan, a contemporary philosopher, called it "four sentences in a horizontal canal". Because of its conciseness, it has always been praised by people.

Zhang Zai (1020-107712.6), born in Chang 'an (now Xi City, Shaanxi Province), lived in Hengqu Town, Meixian County, Fengxiang County, and settled down to give lectures. One of the thinkers, educators and founders of Neo-Confucianism in the Northern Song Dynasty, his famous saying, "Make a heart for heaven and earth, make a life for the people, link the past with the future, and make the world peaceful", is known as the "four sentences in a horizontal canal" and has been praised through the ages because of its conciseness.