Well as other’s already mentioned China get’s roughly ~20% of their oil from this region. All of that oil has to go through the Strait of Hormuz.
The most interesting part about why this is bad for food security in any country is that our agriculture systems runs on oil (you could say we eat the oil). You need to run your farming equipment & all the processing that is needed to make the food edible. Transporting food from the countryside to cities where most people live is also very “Oil”/Gasoline intensive. At the same time you need to cool/freeze the food (needs electricity which is mostly fossil fuels still). So if your Oil supply runs dry your just fucked. Modern society will just not be able to function with it’s City focused infrastructure.
Oh and the most relevant part is that fertilizers use a lot of oil to be produced. Well it’s not directly involved but still relevant. The Haber-Bosch ammonia production needs Natural Gas (by product from Oil extraction) to function or you can substitute it with Petroleum Coke (Petcoke) which is a byproduct of oil refining. Having less fertilizer is a HUGE problem for the next harvest season because your yields will be much lower which in turn reduces food availability.
So yea everything that you eat & is grown by a farm needs a fuck ton of oil.
I dont think either system will be the one prevailing in the long term, they are both to flawed and do not prevent corruption which will always destroy any system. So yea both are bad, which leads to the question which is currently worse? I’d argue latestage captialism corpo America is worse then CCP China at the moment. I think more average people are suffering in America then in China at this point in time. Dont get me wrong I’m not a fan off China in terms of censorship, oppression of people and other control measures in place, my only argument is that living a standard live in China is easier/more comfortable at the moment then in the US (better healthcare, less household debt, less homelessness, etc.). Also the Taiwan situation is very different then the Tibet and Uyghurs oppression but that’s a whole other topic so I don’t wanna start that discussion