While these private companies exist and are in it for the profits, they don't control the government, meaning any potential price gouging is strictly regulated. The Chinese government actively prevents private companies from becoming too powerful or dominating an industry in the public eye. Instead, they foster competition by promoting and building up alternative companies.
A great example of this is how they handled digital payments. While Visa and Mastercard maintain a monopoly in the West, China faced a similar situation when private mobile payment systems began dominating the market. In response, the government stepped in and forced the ecosystem to open up to competitors.
I wouldn't characterize it as forcing to "open up". It's true they put an end to some of the most egregious anti-competitive practices, but the Chinese tech ecosyatem, including payments, is still notoriously non-interoperable. For example, there's no way to transfer money between WeChat Pay and Alipay.
The relationship between Tencent/Bytedance/Alibaba is what happens when there are no monopoly laws or they are ineffective: every company fighting tooth and nail to corner every market with a single "super-app". No specialization at all and many races to the bottom, like the recent war between Alibaba, JD and Meituan over instant delivery that made every company involved lose a lot of money.
I don’t get the example, any payment in China is basically a duopoly between WeChat and Alipay, meanwhile in US there are visa, mastercard, American Express and discover counting credit card payment only.
But not open up to competitors like Visa.
Credit card processors are, as a natural aspect of their purpose, a deeply useful surveillance network.
In the opposite direction unionpay works at major US retailers directly or at least through a partnership with discover, even Alipay is available at CVS, while us processors presence in China is next to zero.
Alipay is available only through Discover. Chinese processors have no presence in the US. In the same way in China you can use Visa and Mastercard through WeChat.
Correct. A level playing field for all companies regardless of other factors is explicitly a non-goal.