[Machine Translation] His insatiable interest in the secrets of mankind, nature, and the universe was insatiable. Eventually, he refined his painting technique, which finally culminated in his masterpiece, "The Last Supper. The smile on the face of the Mona Lisa, which he kept with him until his death, was the result of a lifetime devoted to the pursuit of intellectual curiosity. This is a masterpiece of critical biography that covers the latest research results, and brings us closer to the mysteries and realities of the artist.