Is it true that the Public Security Bureau asked me to go to high, medium and low-risk areas for big data screening?

Big data, or huge amount of data, refers to the information that involves so much data that it can't be captured, managed, processed and sorted by the current mainstream software tools to help enterprises make more active decisions within a reasonable time.

In The Age of Big Data, co-authored by Victor Meyer-Schoenberg and Kenneth Cookeye, big data means that all data are used for analysis and processing, and there is no shortcut to random analysis (sampling survey).

Big data induction has five characteristics: volume (mass), speed (high speed), diversity (diversity), value (low value density) and authenticity.