The motto of Tianjin Nankai Yu Xiang: "Let fairness change with each passing day" comes from the motto of Nankai School. "Fairness and justice, changing with each passing day" is the motto of Nankai School. Mr. Zhang Boling, the founder of Nankai School, explained: "Yun Gong is a grand duke, not a small one. The small one is just selfish and nothing. Only by letting the public be far-sighted, can we teach others correctly, carry forward collective patriotism and eliminate selfish departmentalism. " "To build a modern country, we must have modern scientific talents, and the educational purpose of Nankai School is to train students with modern talents, which requires not only modern theoretical talents, but also practical work ability." "The so-called rapid development means that not only everyone should be able to accept new things, but also become the creator of new things; Not only must we catch up with the new era, but we must also be at the forefront of the times. "