Saudi and EAU too are selling partly oil in rmb to China too. Iran's upcoming 400b 25years investment deal with China will see Iran supplying oil to China at highly discounted pricing and Chinese firms will get first right for all Iranian oil project developments. I predict that very soon the US will be expressing concern for the right of the Iranian people and her sovereign integrity(selling off to China).They still need some $US to buy oil. But Russia and Turkey are decoupling from the $US already. More currency swaps need to be done.
Also worthy of notice is the development of China's DC/EP, they have started a public trial but remain quiet about it.