Rebirth of the All-Around Scholar

On his 40th birthday, as steel bars fell from the construction site, Ma Xiaolong, who had spent a lifetime as a bricklayer, was reborn. He returned to 1989, the first day of elementary school, and at the same time, the 【Study Hard】 system appeared within his body.【Ding: The host has completed the first-grade Chinese language course, rewarding the skill: Reading (lv1).】【Ding: The host has completed the first-grade math course, rewarding the skill: Mental Calculation (lv1).】【Ding: The host has completed the first-grade science course, rewarding the skill: Meteorological Observation (lv1).】【Ding: The host has completed the first-grade physical education course, rewarding the skill: Dancing (lv1).】【Ding: The host has completed the first-grade music course, rewarding the skill: Vocal Music (lv1)....