China will go to war with Israel to protect Iran. China will not let a US puppet government be installed in Iran that will prevent their belt and road initiative.
Iran being a close ally of China is essential to China's 100 year plan. Iran is quite literally a lynch pin connecting the center of the network they are building.

China wants to build small nuclear power plants all along the overland route to power their highspeed rail system and Iran would be a major partner in this project.

You're delusional.
How do you even come up with this shit?

I blame the internet.