Funny you mention about Quebec. If anything, Quebec is the one will refuse to join US. Quebec value its French heritage and French language, it is incompatible with US. Unless US is willing to accept French as its official languages.
Probably much like in the 1980s when the "51st state" movement/party in Quebec was formed. It wasn't going to happen then and I highly doubt it's going to happen today or with Canada overall. General discussions, debates, articles, polls, etc. about Canada becoming the "51st state" have been around for ages but there is still no 51st state.
Oh no. The trade between China and Russian was relative small until invasion of Ukraine. With all the sanctions, Chinese companies took the vacuum left by western companies.
The majority of staffs that China import from Russia is energy, whereas China export almost everything else that Russian needs for everyday life. From smartphone to cars, from appliances to soda, you name it.
As I stated, China and Russia had gotten much closer economically and militarily during the Biden years. The Biden years included the 2022 Russia invasion of Ukraine and the signing of the China/Russia "no limits" partnership on political, economic/trade, and military cooperation.