Fighting crimes and being a guardian of the community attract many young people to become police officers. However, it sometimes goes against their expectation of living a thrilling and glorious life. Their daily routine covers all kinds of trivial matters, which has earned them the moniker "gun-carrying nannies." The dedication with which they perform a wide range of duties required by their job has led to falling national crime rates over the past decades, making China one of the safest countries in the world.