People can try to reinvent themselves. I don't think you can really change who you are though because who you are is pretty much where you came from and what you've done up to now.
Apparently one in five people in the world are Chinese. And there are five people in my family so it must be one of them. It's either my mum or my dad. Or my older brother Colin. Or my younger brother Ho-Chan-Chu. But I think it's Colin.