At the age of thirty, start to be self-disciplined!On Jiang Chen’s 30th birthday, he obtained a system that could make him stronger through self-discipline!Discipline yourself for a day and get a small reward;Discipline yourself for a week and get a moderate reward;Self-discipline for one month, get the best rewards;One year of self-discipline will earn you the best reward;Ten years of self-discipline, the prize is unknown.