1. The lights are on at three o'clock and the chicken is on at five o'clock. It's when men are studying. Black-haired people don't know how to study early, and white-haired people regret studying late. ——Yan Zhenqing

Interpretation: From midnight every day to the time when the rooster crows, it is the best time for boys to study. In their youth, they must know how to study hard and study diligently. But if you only know how to play and don't know how to study hard, you will regret when you are old that you didn't know how to study hard when you were young. When you get older, you will regret why you didn't know how to study hard when you were young.

2. An inch of time is worth an inch of gold, but an inch of gold cannot buy an inch of time. ——Proverb

Explanation: An inch of time is as expensive as an inch of gold, but an inch of gold cannot buy an inch of time. Time is very precious.

3. Three spring flowers are a good thing, so you must start studying early. When flowers bloom and fall, life gets old easily. ?——"Cherish Time" Anonymous

Interpretation: In the spring season, the flowers are in full bloom. If you want to learn, you must do it while you are young. No matter how beautiful the flower is, it will wither at some point. Life is fast and the appearance is easy to grow old. You should cherish the time and study hard. No matter how beautiful the flowers (years) are, they will fade away. People should cherish their time and study diligently.

4. It is easier for a young person to learn than to become an old man, so no time is wasted. ?I haven’t noticed the dream of spring grass in the pond, but the sound of autumn leaves has already begun in front of the steps. ——Zhu Xi of the Song Dynasty, "Occasionally"

Interpretation: The days of youth are easy to pass away, but it is difficult to succeed in learning, so every inch of time must be cherished and not easily let go. Before I woke up from the beautiful spring scenery, the sycamore leaves in front of the steps were already rustling in the autumn wind.

5. The prime years will never come again, and the morning will never come again. ?Be encouraged in time, time waits for no one. ——Tao Yuanming, "Miscellaneous Poems" of the Wei and Jin Dynasties

Interpretation: Once youth has passed, it is impossible to come back again, and you will never see the second sunrise in a day. You should encourage yourself when you are young and strong. Time passes by and does not wait for others.