the success of China's CIPS ,another challenge to USA's economical hegemony?

[badguy2000]

But why do they pay in RMB? Normally countries ask for payment in USD/Euro because they want to build their forex reserves. Does China offer any incentives for payment in RMB? One incentive I can see is that the RMB has been undervalued for a long while so it is attractive to pay in, works out cheaper.

People stock RMB because they are confidence that they can buy whatever they need with RMB,while china is the global largest supplier of manufacturing,agriculture ,and construction.