I'd like to know more about their methodology as well. Especially given that there was a report back in 2022 showing that average Chinese has become more wealthy than the average European https://www.businessinsider.com/typical-chinese-adult-now-richer-than-europeans-wealth-report-finds-2022-9

I'm guessing there's a lot of variation in how the wealth is calculated. It would also be interesting to know if these kinds of reports account for things like social services and infrastructure. For example, when people have free healthcare, and good public transit then their expenses are much lower than in places where they don't.