It is age related:
In a report from the Chinese Center for Disease Control and Prevention, case fatality rates were 8 and 15 percent among those aged 70 to 79 years and 80 years or older, respectively, in contrast to the 2.3 percent case fatality rate among the entire cohort [27].
https://www.uptodate.com/contents/covid-19-clinical-features
Today we have a big experiment in China, going from total lockdown to nothing. We will see the result in a week or so.
AdmSmith wrote: “It is age related:”
I’ve seen reports that the Chinese population age distribution tilts towards elderly.