Iranian nuclear issue cannot be resolved in one move: FM

China said on Monday that while the fresh round of Iranian nuclear talks made progress, resolution to the controversial nuclear program cannot be reached in one move.

The comment was made by Foreign Ministry spokesman Qin Gang after three-day intensive talks in Geneva between Iran and Britain, China, France, Russiaand the United Statesplus Germany, the so-called P5+1, failed to produce an interim deal amid hyped expectations.

The world powers were engaged in "serious and arduous" talks with Iran in Geneva, and both sides narrowed gaps and enhanced understanding, said Qin at a daily news briefing.

All parties showed willingness to resolve the issue during the talks, Qin said.

"However, as the six nations have been in talks with Iran for ten years, the Iranian nuclear issue is too complicated to be solved at one stroke," he said.

Chinese Vice Foreign Minister Li Baodong attended the talks, said Qin.

During the talks, Li called on parties concerned to continue dialogue and consultations on the current basis to enhance mutual trust and expand consensus.

China has always maintained that the issue should be resolved via dialogue, said Li, adding that China will continue to maintain contact with all parties concerned and contribute to the peaceful settlement of the issue through political and diplomatic means.

The six nations and Iran agreed to meet again on Nov. 20 at the conclusion of their talks on Saturday.