Outside of Wuhan in the rest of China it’s at about .04% mortality rate.
https://www.npr.org/sections/goatsandsoda/2020/03/03/809904660/why-the-death-rate-from-coronavirus-is-plunging-in-china
Why The Death Rate From Coronavirus Is Plunging In China
March 3, 20206:18 PM ET
Similarly, a study released by China’s Center for Disease Control last month found that if you factor out all the data from Hubei province, where Wuhan is located, the fatality rate in the rest of China drops to 0.4%.
Why such a big difference between Hubei and the rest of China?
At a news conference the next day, Dr. Bruce Aylward — who had just concluded a fact-finding mission to China for the World Health Organization — pointed to three likely factors.
First, said Aylward, is that Wuhan suffered from being the first place where the new coronavirus surfaced. "Wuhan started fast and, and early. People didn’t know what we were dealing with. We were learning how to treat this."
The more patients medical staff saw, the more they could start identifying what kind of supportive care made a difference. So by the time patients started showing up in hospitals in other provinces, doctors and nurses there had a lot more information about what it takes to keep patients alive.