Change is certain. Peace is followed by disturbances; departure of evil men by their return.

In the middle of difficulty lies opportunity.

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.

"Silence is complicity, and I refuse to be silent."

当信息不完美或市场不完整时，市场本身不会产生有效的结果。

每一次挫折都是为了卷土重来。