Three-Body Problem from Scratch

I am an ordinary person. Lived an ordinary life. The only extraordinary thing is that I died saving a child. It turns out that time really slows down after death! I feel like my whole life is running through my head. I hope my next life will not be so ordinary and boring. God may have heard my voice and made me reborn. Let's be reborn in a parallel world because this is Earth. Because I have thirty or forty years of experience in another world. When I was in my twenties, I succeeded in becoming rich, famous, and powerful. There are also all kinds of beauties. But until I discovered that the world of TMD turned out to be the world in the Three-Body novel, I collapsed. What's the use of having wealth and rights? What should I do next... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.