Nowadays, with the development of social economy and the continuous development of media networks, the things recorded by big data are more and more comprehensive. Moreover, for the current epidemic situation, although China has made great achievements in epidemic prevention and control, there are still cluster infections in some areas, such as the Qingdao infection this time. One of the infected people has a brother, so it can be said that he contacts a wide range of people, because he drives a taxi and contacts many people every day, but for a short time. In my opinion, this is the power of big data. I can analyze it carefully below.

First of all, taxi calling software is very developed. When we take a taxi, we don't have to wait in the same place, but use our mobile phones to call a taxi. Then it is very simple for these passengers to find. We can check the order on the taxi driver's mobile phone, and then find the mobile phone number of these passengers according to the order to dial and lock these passengers immediately. Of course, there are also passengers who take taxis by waiting in place. But now the payment methods are diversified, and people who pay in cash can be said to be gone. When people pay, they will pay through Alipay or WeChat, so they can lock this micro-signal through the taxi driver's collection record. Because both WeChat and Alipay are real-name authentication, it is easy to find these passengers.

So in general, the role of big data is very big. It can keep track of everyone's whereabouts and then give immediate feedback when conducting an investigation. Qingdao can quickly control the epidemic within a certain range after the outbreak. Big data also helped a lot. He can find the whereabouts of people through data, and then control the number of infected people within a certain range, so that Qingdao can turn the corner this time.