The visit is expected on Thursday, yet official China has not made an announcement. Trip aims to boost Gulf relations five months after US warned Beijing it would not cede Middle East or just to divert some attention from some serious domestic problems, or both.
The price cap could make it difficult for Moscow to sell its oil for a higher price. But will EU embargo actually hurt Russia?
European Union governments tentatively agreed on Thursday on a $60 a barrel price cap on Russian seaborne oil - an idea of the Group of Seven (G7) nations.
The EU executive on Tuesday unveiled a gas "safety ceiling" of 275 euros