I was not surprised if China and Russia used Bitcoin as a trading method, I knew they were BRICS members, that was the way they hit the dollar, at this time the economic war was happening, but in my observation Even though they use the Bitcoin network as a trade route, I think it has no effect on bitcoin.
In my observations the dollar also had no big effect, Bitcoin was used by the government for trade routes, but the dollar was still used by the Chinese and Russian people except: the two countries prohibit the community from using dollars from using bitcoin in trade, now it only has a big impact on the growth of Bitcoin.
They are trying to de-dollarize and Bitcoin will be one of their choices in near future and in long term. Before they can launch a currency for BRICS, that I don't know when it will happen and whether it will succeed, they will try to use something available like Bitcoin.
Like China are trying to sell USA bonds and switching their national reserves to gold. Bitcoin is better than gold, in fungibility, flexibility, portability and more, so that it can become a most favorite asset for China and Russia doing their billateral trades and even with other national trade partners.
When they use Bitcoin for cross-border national trades, they will do it secretly because they don't want to be watched by other competitive nations like the USA and European nations. Russia is already on massive sanctions after the war invasion to Ukraine and they don't want to have more sanctions by any reason. China don't want to be publicly identified by other countries about all their trades with a country in troubles like Russia.