Sustainable development is not an option, but a necessity for the coal sector.

The most important thing about a theory is that it explains the facts.

所谓意念诚实，就是说不要自己欺骗自己，像厌恶难闻气味那样厌恶邪恶，像喜爱美丽的女子一样喜爱善良，这样才能说心安理得，所以君子在一个人独处时必定要谨慎。