I think the reason China was able to control it was that they built those additional hospitals and brought in 40,000 extra healthcare people. Plus they locked it down harder, swifter, and earlier in the outbreak then Italy has done. I also would expect China's extensive contact tracing to be much better by using GPS and WeChat history, much like SK has used texts. Add in to that the extensive and mandatory mask usage everywhere. China also has more recent history of fighting this style of virus and in pandemic planning, with there SARS, and Bird Flu history.
This thing is gonna ravage USA and Europe, the lockdowns are half hearted there are no masks and the governments can act the same as they can in China. Already you have big US cities giving up on testing and contact tracing, it's not gonna be pretty, hopefully the USA population density should help.