In my less than well educated opinion, North Korea is China’s shame. China kept North Korea a float and dear leader in power to keep a substantial number of America’s forces captive south of the DMZ for 50 years now - all at the expense of millions of North Koreans. It accomplished nothing other than the pain and suffering of millions of Koreans.
Shame on China.
Yeah, but I think China liked Korea to be divided. China would rather have its neighbors to be weak.