The problem in Beijing that everyone on the road was an official or related to an official, so the police couldn't do traffic stops without risking their careers. That has changed a bit, and they invested heavily in the Black Audi police (CPC police who are allowed to police official and their families) to counterbalance the chaos that everyone being connected caused.
> Xi's tenure in Shanghai was transitory (less than a year from what I remember) and imo was due to his previous role in Zhejiang.
Not that we have much to go on since Xi is president for life now, but I bet the next leader of China does their time in Shanghai like the previous ones.
> Those are all closely connected with Shanghai economically speaking, and all part of Zhejiang or Jiangsu.
Wenzhou is more a Fujian extension, Zhejiang and Jiangsu are China's richests provinces, and I think Hangzhou has left Shanghai's shadow by now.
We can also throw in Guangzhou and Shenzhen, but in general even the poorer southern cities (Kunming, Guiyang, I kind of want to say even Changsha and definitely Wuhan/Chongqing) are and have been well organized.
But, conversely, a poor farmer in Yunnan was less likely to choose to become a migrant worker in Kunming instead of a Tier 1 metro.
IMO, Beijing's craziness can be attributed to the fact that it is the economic center for much of Northern China - and a number of migrants from large neighboring laggard states like Hebei, Shanxi, Henan, and others ended up gravitating to Beijing.
> Shanghai usually gets the CPC members running it who will lead the country in the future
Not anymore. That was more of a Jiang- and Hu-era bias.
> a party secretary of Shanghai at some point (like Xi in 2007)
Xi's tenure in Shanghai was transitory (less than a year from what I remember) and imo was due to his previous role in Zhejiang.
> Hangzhou, Suzhou, Nanjing, Wenzhou...
Those are all closely connected with Shanghai economically speaking, and all part of Zhejiang or Jiangsu.