What nonsense, neither China nor Russia could save their friend Maduro in Venezuela.
Nor are either of them willing to help Iran or save it in any way.
They have no global reach in the form of alliances, and more importantly, they are unwilling and unable to build something like NATO. What common ground would they have? The Chinese have zero cultural ties with the other countries around them, and they don't want to build any.
You can't form an alliance with economics, money and infrastructure projects abroad.
China must first solve the problem of its image that it is willing to take risks for another country.
Russia is quite isolated; apart from support from North Korea and Belarus, no one supports it, and it does not support anyone abroad. As soon as the United States intervenes anywhere in the world, you can be sure that Russia and China will withdraw if the country is on the brink.