Should the US and China co-operate over Iran?
President Obama has made a direct appeal to Chinese President Hu Jintao for the two countries to co-operate on the Iranian nuclear issue. Do you think this strategy will be successful?
Mr Obama stressed "the importance of working together to ensure that Iran lives up to its... obligations." For his part, President Hu called for "healthy and stable" relations.
China, a veto-wielding UN Security Council member with strong ties to Iran, has in the past expressed reluctance to see new sanctions imposed.
Do you think China will change its position on Iran? Should Iran face tougher sanctions? Are you concerned about Iran's nuclear programme?