"I don't know what I'm doing tomorrow, I don't have a plan. I'm happy to be alive, to be healthy, and to have my kids."

"The best way to learn mathematics is to do mathematics."

质量不是一时的风尚；它是一种哲学。

In every word, there is a world waiting to be discovered.

Always be willing to learn, because the moment you stop learning is the moment you stop growing.