The only limit is the one you set yourself.
聪明的人谈现在,愚蠢的人谈过去,傻子才谈未来。
Research is a journey where the destination is unknown, but the pursuit is everything.
自由不是做你想做的事,而是想要你该要的东西。
The most important thing is to tell a good story. Everything else is secondary.