Don't just fight in the North or the South. Always imagine every battle in your mind, where everyone is both your enemy and your friend, and all possible events happen simultaneously. That way, nothing will take you by surprise, and everything that happens will be something you've already imagined.

High expectations are the key to everything.

每本书都是一次前往未知世界的旅行，充满了可能性。

"Every book is a new adventure, a new world to explore."

The pursuit of mathematical knowledge is a journey that never ends; there is always more to discover and understand.