When you attack coal, you attack middle America.
Always look for the positive in every situation. There is always something to be grateful for.
《三民主义·民权主义·第一讲》（1924年3月9日）
Never let anyone tell you that you can’t do something.
The goal of mathematics is not to solve problems, but to understand them.
Enterprises must dare to break through traditional thinking and use new technologies to reshape the industry landscape.