Appreciate everything your associates do for the business. Nothing else can quite substitute for a few well-chosen, well-timed, sincere words of praise. They're absolutely free and worth a fortune.

True literature should be able to change the reader's life.

The best books... are those that tell you what you know already.

The transformation of the coal industry must rely on technological leadership, and green development is the only way forward.

优化是在给定约束条件下做出最佳决策的艺术。