I advise you not to take it. It's no use watching China's embedded video. The reason why you feel a little gain from reading those published on the Internet is because the security software, setting up the environment, burning programs and burning images he talked about are of little use to your work. He has no experience in Android, and the essence of Android work goes beyond his video. In addition, the most important thing is that this person's character is too bad. Before buying the video, he personally called to be caring and attentive. After paying, his attitude changed immediately. Open an account if you dare to ask. If you can't watch the video, you will spend money for nothing and threaten to kill the buyer. Bad character. Let's polish your eyes.