China aren't strictly speaking allies. They get a lot of oil from Iran and have plenty of deals in place, to the point that many people believe that the Venezuela coup and Iran war are a US ploy to destabilise China specifically.
China basically stay out of geopolitics far more than people assume. They are very unlikely to enter the Iran war on either side, ever.
I'm 95% sure it isn't, I've obsessed over that game for years and this makes no sense to me.
Edit: It's the wizard of Oz