Nothing government mandated except maybe in Daegu where the worst of the outbreak was, not sure about that.
I was there during the whole thing. No businesses closed down, no curfews, no one lost their jobs, and bars/ restaurants all stayed open. Hundreds of people walking on every block in cities with no "social distancing".
What they did and are doing is test everyone that might have the disease. Then they find out where anyone that tests positive has been in the past few weeks. Then they test anyone that's been in the same places. Then they do the same thing to anyone that tests positive... They put all this information online on google maps and send out emergency alert text messages so you can look and see if you've been to those places, then get yourself tested. Rinse, repeat. Meanwhile in the US, you can work in the same building or go to the same grocery store as someone that tested positive, you can't get tested. You can have symptoms, and maybe still can't get tested.
So, instead of limiting the spread of the virus with surgical precision like Korea is, we have to use a "carpet bombing" strategy and literally just shut everything down and keep everyone inside of their homes.
Why can South Korea test everyone but we can't? The answer to that question is how you fix this problem in the future. Blaming China isn't how you make yourself prepared in the future. Fixing our emergency procedures and healthcare system is how we make ourselves prepared in the future.