You can't. Can be collected through internet channels. At present, the data types of the Internet are still very rich, and many data also have relatively high value density. Because of the diversity of Internet data itself, it is difficult to distinguish between true and false, so when collecting data through the Internet, different data collection methods should be adopted according to different data types. Commonly used data collection methods include the following:

1, technology collection means. Technical collection methods can often be used to collect large-scale low-value density data, such as collecting data through reptiles (which can be written in Python) and so on. Technical means are more suitable for centralized collection and corresponding analysis of network data, such as trend analysis. Because the data collected by technical means is difficult to distinguish between true and false, we should pay attention to the boundary problem when applying the data.

2. Exclusive channel collection. Now various statistical (consulting) institutions will also provide various services with the help of the Internet, and some data services are free. For college students, we can also focus on these channels.

3. Make full use of large Internet information platforms. Obtaining valuable information through large Internet information platforms is an important data collection method, and these data often have high value density. At present, large Internet information platforms often provide identity authentication services for information providers, which will obviously enhance the value density and credibility of information.