I think a lot of friends put too much hope on to Zhen Zhen. She is only a smarter girl compared to the rest. Also this girl grew up in a very good environment, rich, and the whole family dotes on her, and did not really put too much expectations on her strictly, just like a flower grown in a greenhouse. So it made her attitude a bit more pampered, and act as she likes, and sometimes what she says are not processed by the brain. You see the things that she plays with, none of them are normally played by ladies from rich families, but she likes them, and her family also does not reprimand her as well.