Spend 40 million for a meal and turn around and earn 100 million, which is really not a loss. Can such a good thing happen in reality? There really must be! The original version of the gray-haired old man in the clip is Buffett, a well-known investor in real life, known as the "stock god". Buffett became a millionaire at the age of 30, fulfilling a lifelong dream for many. Before he was 50 years old, he built a business empire controlled by himself. Finally, at the age of 70, he surpassed Bill Gates and other rich people and became the richest man in the world. Buffett's success mainly comes from his secrets in stock investing.