The topic is billionaire, namely, If you had a billion dollars, what would you do. How about browsers billionaires firstly? No, it isn’t interesting. What can we do with those non-existent one billion dollars? Hey, I am a man, the cosmetics, the luxuries, will not be on the top of the list. The simplest thing is buying an island, for fun? I can’t find the reason. Seriously, The spacecraft can be the first. There are space stations built by NASA(acronymized by National Aeronautics and Space Administration) and CNSA(acronymized by China National Space Administration). But I prefer crewed spacecraft because I could be a crew. The second can be supporting research institute. How about research on immortality? It sounds like perpetual motion, does it? Namely, it’s medical research, that we can prolong the lifespan until eternity. When a scientist states that something is impossible, he is very probably wrong. And the cosmology research is what I want to sponsor if the money is enough. Earth is the cradle of humanity, but one cannot live in a cradle forever. But, one billion dollars isn’t enough, neither for research or spacecraft. The budget is certainly limited, right? Here is some billionaire we mentioned: Rockefeller, an American oil industry business magnate, had 400 billion dollars. But Rockefeller has died, so let’s move on. Zuckerberg, Facebook co-founder, also a philanthropist, has 56 billion dollars. Larry Ellison, Oracle co-founder, has 59 billion dollars. Larry Page, Google co-founder, has 53 billion dollars. Bill Gates, Microsoft co-founder, has 95 billion dollars. Jeff Bezos, Amazon co-founder, has 137 billion dollars. OK, as a former developer, I’m over-focused on IT sphere. Liliane Bettencourt, the founder of L’Oréal that I never heard it, had 44 billion dollars. Kjeld Kirk Kristiansen, the former CEO of The LEGO Group, has 5 billion dollars. Sheldon Adelson, the founder of Las Vegas Sands, has 43 billion dollars. And, maybe the most famous one, Donald Trump has 3 billion dollars. How about Chinese? Jack Ma, the founder of Alibaba, has 34.7 billion dollars. Pony Ma, the founder of Tencent, has 42.7 billion dollars. Robin Li, the founder of Baidu, has 18.8 billion dollars. Wang Jianlin that is famous for her son has 28.1 billion dollars. And, Richard Liu, the founder of JD, that is infamous for the sexual assault, has 12.7 billion dollars.