Canada is more ethnically homogeneous than China, hans and anglos (and french) both replaced their ethnic native populations, difference is that China has been culturally assimilating them for millennia, while you came to bitch here after the first time you saw a non-native indian
Also, that graph is from the World Inequality Database, the formula is
>[Net personal wealth]=[Personal non-financial assets]+[Personal financial assets]-[Personal debt]
First, it doesn't mean "the bottom half of China on average holds twice as much wealth..." but NET wealth, you can hold more net wealth than a multimillionaire or even a billionaire if he is overleveraged, it's common sense that you're not really better off than him, it's the same for countries.
Secondly, it means the average bottom 50% of usonian is, on average, a net creditor after paying off their rent and mortgage.
Third, that is a PPP (purchasing power parity) value, nominal (market) value, from the same source and year, is the same for both $4800
https://wid.world/share/#0/countriestimeseries/ahweal_p0p50_z/US;CN/2019/us/k/x/yearly/a/false/-4297.1145/8000/curve/false