@tofugolem From what I heard, the grocery bills differences were mostly because doing simple currency conversions doesn't account for purchasing power, so an American going to China would get a better deal on their dollars after conversion, but for someone working a job in China groceries would have a similar impact on their finances as for an American in the US. Haven't seen anything about medical costs, but it's hard to be worse than the US on that front.
@tofugolem Also, it's naive to think that Chinese people didn't know about the 40-hour-workweek or overtime pay before. While all unions except the state-run non-union are banned, there are still worker's struggles throughout the country (see https://chuangcn.org/ for examples). Having some cultural exchange is valuable, especially considering the ramping up of tensions between the two countries concerned), but I doubt it will have much effect when it comes to labour issues.