Personally, I think the choice does not need to look at the size of its size, what the first domestic, listed companies these more imaginary things. As long as you look for a can lead you into the door, give you to establish a framework, small knowledge points to guide the learning, and can have a clear career planning, understand the requirements of the enterprise position, but also know what they should learn. If you are in Beijing, still Silicon Valley here is quite good, big data lecturers have nothing to say, the teaching process is very attentive.