I have seen many sci-fiction movies about time travel, most of them tended to send the main characters back to the ancient time and changed the history. Only a few of these movies were about future. So, if we plan to a time travel, the first thing we face is to back to past or visit the future. As for me, both of them appeal to me very much. I have two reasons. First, I always have a regret that I didn't choose a favorite major at the end of my high school life. It caused me do a job which I really don't like. I really want to go back to my high school life and start a new life. Second, I love my family, I don't want to change anything of my life. I just want to know if I make some mistakes now which will cause some bad results in the future. If I can predict the future and avoid some mistakes, my future life will be happy and thriving without any annoying things. In fact, both of them won't happen. The world just gives us today, the only thing we can do is to learn something from yesterday, and plan something for tomorrow. To be what kind of people is the thing you need to think about with great care today!