On his 40th birthday, Ma Xiaolong, a construction worker who had spent half his life carrying bricks, was struck by falling steel reinforcement. He was reborn back to 1989, the first day of his first year of elementary school, with the "Study Hard" system in his body. [Ding: Host completed the first-grade language course, reward skill: Reading (lv1).] [Ding: Host completed the first-grade mathematics course, reward skill: Mental Calculation (lv1).] [Ding: Host completed the first-grade science course, reward skill: Meteorological Observation (lv1).] [Ding: Host completed the first-grade physical education course, reward skill: Dance (lv1).] [Ding: Host completed the first-grade music course, reward skill: Vocal Music (lv1)...