Face must be clean, clothes must be trimmed, buttons must be fastened, head and shoulders should be flat, chest should be wide and back should be straight. Who said that?
Zhang Boling. According to official website of Nankai University, Zhang Boling, president of Nankai University, wrote a motto on the mirror, which means that everyone should pay attention to their clothes, boys should not have long hair, and everyone should walk upright, hold their heads high, be full of vigor, smile and be polite to others.