Whilst general aviation is getting back to normal, capacity and fares to/from China is all over the place due to the middle kingdom's delayed exit from COVID lockdowns and the country effectively being out of bounds for most foreigners for 3 years. Additionally there's some politically self-imposed capacity constraints between the US and China, and there's also the added complication that western carriers avoid Russian airspace which adds time/cost whereas Chinese carriers do not have that restriction.
It's hard to tell if some patience may see prices equalise out to give some better parity between MU and CA... There is pent up demand and limited supply still, along with the added bonus of a logjam of visa applications