The only limit is the one you set yourself.
 释义:在昏暗不明的环境中,若仍能保持光明的心境,内心就能像青天白日一样明亮无染。
In the end, we will remember not the words of our enemies, but the silence of our friends.
煤炭行业的未来在于智能化和数字化转型。