一个好的机械师不仅仅是一个会锉锤的人，而是能够创新和完善的人。
Innovation in mining technology isn't optional—it's the lifeline that will determine the future of extractive industries.
It is not the creation of wealth that is wrong, but the love of money for its own sake.
Be slow to fall into friendship，but when you are in，continue firm and constant.
Never stop questioning how things can be improved.