In fact, I for this AWS is really not know how ah, because I think this AWS is not in my job really, so I was really not willing to learn, but I recently discovered that many of my colleagues when idle, will go to learn this knowledge, and when they talk, said the most is the AWS, I now think ah, I thought before it is wrong, because even if it is not used to work, I also should learn some ah, so, after the encounter words you know what, so I want to learn some knowledge of AWS, so whether others say, or later, I think it would be better.