2. Fei Cai Johnson's famous saying about time: the clock ticks with the movement of the hands: "second" is a soldier marching bravely, "minute" is a sergeant, and "hour" is a brave officer who leads the team to the front. So when you are bored thinking, please remember that there are thousands of horses in your palm; You are their commander in chief. When looking back on them, we might as well ask ourselves whether they played the greatest role in the battle.