Permanent Representative of China to UN Li Baodong has urged US to hold constructive talks with Iran as imposing sanctions against the country would have no effect.     It would be better for Washington to try constructive talks with Tehran, Li told IRNA during an exclusive interview which was made on the sidelines of a UN meeting Wednesday. The Chinese envoy reiterated Beijing\'s opposition to the US sanctions against Iran’s oil industry, stressing that such restrictions would have no effect. China believed that sanctions would change nothing, Li said adding that the two sides should remove problems and replace tensions through negotiations that he believed was the only solution to the problem. The US treasury secretary who was in Beijing to garner China’s support for imposing further sanctions on Iran, faced strong reaction by Chinese officials towards the idea. A similar situation had lately occurred when US officials sought support of Turkish officials for imposing furhter unilateral sanctions on Iran. Turkish Foreign Minister Ahmet Davutoglu expressed Ankara\'s disagreement on the issue.