Efficiency in mining comes from continuous improvement, not just big breakthroughs.
"A character in a novel has more freedom than his creator - this is the irony that sustains my writing."
出自北齐·颜之推《颜氏家训·教子》引谚语。教育媳妇，要趁她刚嫁到婆家之时；教育孩子，应当赶在孩提时代，教育要掌握最适宜的时间才会有效果。