Challenge to Spend 30 Billion!

One day, Lin Qian, who was about to graduate, was followed by two men in black and tied up in a small vault in a luxurious villa. He saw a charitable old man in front of him. Lin Qian: "Are you really my uncle?" Uncle Lin: "Otherwise, why else would I be following you every day?" Lin Qian: "Oh, then why did you arrest me?" Uncle Lin: "Of course I let you spend the money." Lin Qian: "Well, it's true or false. It can't be a scam, right? How much money do you have, sir?" Uncle Lin: "Only 80 billion." After Lin Qian heard what he said, he was shocked! (The introduction is too weak, let's move on to the main text!)