What is the age and author of persuasion works?

Poetry dynasty: the author of the Tang Dynasty. Encourage young people to cherish their youth, learn to study hard when they are young, and make a difference when they are young, otherwise: Yan Zhenqing. Black hair doesn't know how to study hard, and it's too late to study when you get old. It is when men study: the lights are on at night and the chickens are on at night. Let children understand that life is short and study hard. But if you only know how to play and don't know how to study hard. Midnight is the best time for boys to study every day. Only when you are old will you regret not knowing how to study hard when you were young. Appreciation of "Encouraging Learning" is an ancient poem written by Yan Zhenqing in the Tang Dynasty in order to improve his enthusiasm for learning. Poetry reveals this profound truth in just 28 words, and achieves the inspiring effect. It's too late to regret, so we should cherish time.