I am not a sociologist, political scientist, or an economist. It appears that China is too big to govern and has become a diseconomy of scale. China has 160 cities with over 1-million people in them (US has 10 cities) and I think it's a miracle that the lights still work and they have running water. When you double the size of a plane it it becomes 4-times heavier (Observe what it takes to fly a B-52). The PRC seems…
The population wasn't as big, but without modern technology the history of Chinese national governance is likely better than any other region in the world. From around 250 BC to 1911, the Chinese usually had effective national government which made China a world leader economically, culturally, and technologically.
(There are many caveats: 1) During that time there were periods of civil war and division also; 2) the geographical area defined as China varied quite a bit; 3) I use the word "usually", but I don't know the percentage of time stable, effective government was provided; certainly there were many successful emporers and dynasties.)