This is very normal, because now is the era of big data, you do on the Internet, you are interested in and you like, Baidu through the background of the cloud service calculations can know, and so you next time in the use of Baidu know, he will be based on your previous point of view to you to push the closest thing. This technology is not only Baidu reuse, now all the Internet are in use, such as you log on Taobao Jingdong and so on e-commerce, people will be the same according to your usual use of the situation pushed to your favorite things.