wired.com has a long article about the current reality & future workings of the Chinese social credit system:

Inside China's Vast New Experiment in Social Ranking

Excerpt:
"For the Chinese Communist Party, social credit is an attempt at a softer, more invisible authoritarianism. The goal is to nudge people toward behaviors ranging from energy conservation to obedience to the Party. Samantha Hoffman, a consultant with the International Institute for Strategic Studies in London who is researching social credit, says that the government wants to preempt instability that might threaten the Party. “That’s why social credit ideally requires both coercive aspects and nicer aspects, like providing social services and solving real problems. It’s all under the same Orwellian umbrella.”
In 2015 Ant Financial was one of eight tech companies granted approval from the People’s Bank of #China to develop their own private credit scoring platforms. Zhima Credit appeared in the #Alipay app shortly after that. The service tracks your behavior on the app to arrive at a score between 350 and 950, and offers perks and rewards to those with good scores. Zhima Credit’s algorithm considers not only whether you repay your bills but also what you buy, what degrees you hold, and the scores of your friends.
[...]
Like any conventional credit scoring system, Zhima Credit monitors my spending history and whether I have repaid my loans. But elsewhere the algorithm veers into voodoo, or worse. A category called Connections considers the credit of my contacts in Alipay’s social network. Characteristics takes into consideration what kind of car I drive, where I work, and where I went to school. A category called Behavior, meanwhile, scrutinizes the nuances of my consumer life, zeroing in on actions that purportedly correlate with good credit."

It's probably only a matter of time before governments everywhere will (try to) introduce similar systems. Brave new world! I hope I die before this becomes reality worldwide.