Li Si's first sigh was shortly after the beginning of the biography, and the original text was as follows: "Li Si is a scholar of Chu State. When I was young, I was a small official in the county. I was frightened to see rats and dogs in the toilet of the official residence. Si entered the warehouse, watched the mice in the warehouse, ate millet, and lived under the great guard, so Li Si lamented:' Man's virtue is like a mouse, in his own ear!' Reese's first sigh translated into "people are actually like mice, but in different situations and positions." Later, some people joked that this theory was called "Lisboa Theory". Based on this, it can be considered that Reese realized the Tao from this, so he has been pursuing a higher life of "catching mice in the barn, eating millet and king David" all his life.