China's government is "very stable" until it's not. As a society, China has a long history but the central government has essentially collapsed or experienced violent revolution in 1976, 1969, 1949, 1927, 1911, 1850, 1796, 1644, etc. Perhaps we have reached "the end of history" and the Chinese Communist Party will now maintain stable control forever. Or maybe it will all fall apart again in a few decades due to resource shortages or factional power struggles or a foreign war.