I have a plan to have a business in education field, i.e. to build a course for students, like teaching them maths, physics, etc. I had tried it with my friend, but it was failed because we were lack of teachers back then, while we already had many students. So my friend and I had to teach some of the students ourselves. It didn't work well, because it was back when we were in college, so we couldn't manage our time, so we decided to close it. I hope someday I can build a big successful course. But it's going to need big fund and good management.