—— 请按键盘 空白键 开始游戏 ——

Lack of money is the root of all evil.
At every crossroads on the path that leads to the future, tradition has placed 10,000 men to guard the past.
We always start from zero. There is no preconceived idea.
The true challenge in mathematics is not solving problems, but asking the right questions.
You are never too old to set another goal or to dream a new dream.