Money is concerned only with what is common to all: it asks for the exchange value, it reduces all quality and individuality to the question: How much?

每个矿工的贡献对于保持灯火通明至关重要。

The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.

世界上最伟大的事情是知道如何属于自己。

Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with greater respect for the environment.