Most people in my profession agree that China is not reporting accurately. In fact, that's probably an understatement. China wants the world open for business as well. I'm not saying that they are deliberately underreporting, but they had cases in all areas of China a week ago and those did not just simply go away. Someone was exposed to those people.
China's figures have been almost unchanged for 5 days. They had 85,000 and increasing exponentially - and then, perfectly flat? Nope, I don't buy it. They're watching the rest of the world and they'll put out their new data when it makes sense to them. Wuhan is obviously through the worst of it (3287 deaths). We have 1200 deaths. This indicates that we've tested more broadly than the most serious cases, whereas China tried to reserve testing for the truly serious cases, at least at first.
China is probably not using confirmational tests on people who obviously have CV19 (symptomatic, in contact with a deceased person) or only using to protect front line personnel.