COVID-19 Map
Click on each Country name on the left side. On the lower right, there's a graph of the numbers reported in that country over the last few months. Note that most graphs form a curve which rises rather steeply.
A few have a negative second derivative (cases climbing but rate slowing).
Only China appears to have a zero (or about zero) first derivative.
Perhaps I'm alone and foolish in being flat-out incredulous of China's claim of no (or near no) new cases since early March. I rather doubt that. Make your own conclusions, and make them known if you will.