China entering the chat is something you wouldn't want to fancy about. China isn't as dependant on the West as it was at the past.
China's GDP is export dependant yes, but its export as percentage of GDP has been steadily declining from peak 37% in 2007 to 20% of the economy as of 2022. China's exports are mainly ASEAN, EU and U.S, while public consumption is growing steadily towards 38.2%, if its not because of the Pandemic they could have reached 40% if not more by now. Quite small for OECD standard but we're talking a country of 1.4B people here.
For one I don't know why would China let go of its trade with EU+US for the sake of failing countries like Russian federation, but if they do, its not something that they could not handle.
China is the world's foremost manufacturing juggernaut, dwarfing that of the US and EU combined. You want to go toe to toe with them ? haha good luck, in 2021 alone China's manufacturing accounts for 30% of the world total, followed by the US at 16.5% and Japan at only 7%.
The West could have do the same trick they did with Russia, that is pulling out companies, but the real estate (factories, equipment, infrastructure) will be left behind in China. In other words, the brand will leave but the equipment stays. And unlike Russia, China is self dependant on many machinery tools and equipment (robots). Even to this day we could see Russian copycats of Western brands in the country.
EU exports to PRC is at $600B daily while China to EU is at $1.3T. Theoretically China would lose more in a decoupling with the West, but its not going to be all apocalyptic for the Chinese. The Russian only contracts by 2% last year, not 20 like earlier thought. China is even more resilient than Russia is.
The economy defied fears of a recession and previous predictions that it would contract by more than 12 percent.
www.aljazeera.com
Just to give an idea of what a competition with China will look like, lets take a look at the number of industrial robots.
China again leads by half of the world's total
A 5-year plan aims to have robots compensate for the country’s decreasing workforce.
www.engineering.com
Steel production again China by quite a margin at 1 Mil metric tons compared to EU's 2nd place at 100K metric tons.
en.wikipedia.org
This is just two example, if I want to translate this into artillery shells produced, then its suffice to say that Ukraine will be in deep trouble.
I might not know much about artillery production of China compared to the US/West. But as a Indo-Pac country citizen, I took notice at the two powers shipbuilding. The US commissioned an Arleigh Burke (9000tons) at a rate of 1.5 hulls per year, The Chinese last year commissioned 4x Type 052D (7500 tons) and 3x Type 055 (11.000 tons). If we were to translate the steel used on those ships into shells it will be all to funny.
The question is not if China can win the hypothetical supply game, but will they do it ? Will they lose dollars for saving Russia ? The wise minds might says no, but geopolitical moves are not always motivated by wisdom alone. Maybe provoking China in regards to Taiwan by visiting representative is not the smartest thing to do right now. I heard Xi Jinping doesn't really care much about economy to national dignity. Looks like (if true) Xi is looking at a game of tit for tat with West