Big data tracking during an epidemic involves personal privacy, so it needs to be managed separately by the public security department to prevent personal information from being leaked, and the public security department can take measures in a timely manner when there are problems with the flow of people.

Big data is a collection of data that cannot be captured, managed, and processed within a certain timeframe using conventional software tools, and it is a massive, high-growth, and diverse information asset that requires a new processing model in order to have stronger decision-making, insight discovery, and process optimization capabilities.