Contentment is natural wealth，luxury is artificial poverty.
史记
I love to challenge myself and push myself to the limit.
只有发自内心，真正喜欢、热爱的事情，才会有百折不挠的勇气，去面对随之而来的问题和困难，在这样的情况下，一切问题最终都会迎刃而解。
Success comes from persistence and the courage to innovate.
The moment you doubt whether you can fly, you cease for ever to be able to do it.