Italy has closed all stores other than grocery and drug stores. All non-essential travel is banned. There's a short list of valid essentials, like taking care of aging parents; there are roadblocks, they'll make you fill out a form stating your purpose, it's a crime to lie about it, and they do sometimes check.
In China, every place you go you get your temperature taken. Go in a building, get on a bus, they take your temperature. Show a fever, they take you to a dedicated fever center, where they check you for flu and bacterial infection. Come up clear on those, you're waiting four hours for a covid-19 test. Come up positive, you're there for the duration. You don't go home to your family because they've found 80% of transmissions are in family clusters.