Negotiations "will contribute to maintaining the authority and effectiveness of the international nuclear non-proliferation regime and to maintaining peace and stability in the Middle East region, and serves the common interest of all parties concerned," Tang told a board meeting of the International Atomic Energy Agency (IAEA).

The 35-nation board of governors of the UN's nuclear watchdog started a five-day session here on Monday, with Iran nuclear issue becoming the focus.

Tang, who is formally the Chinese Permanent Representative to the UN and Other International Organizations in Vienna, noted that there have been some new developments in the issue.

On the one hand, the UN Security Council adopted on March 24 a new resolution with tougher sanctions to pressure Iran to suspend uranium enrichment activities. On the other hand, relevant parties stepped up their diplomatic efforts for resumption of negotiation.

Tang said the recent meeting between the EU and Iran is conducive to resolving the outstanding issues.

"China hopes that momentum could be maintained and progress achieved in the EU-Iran dialogue," Tang said.

Iranian chief nuclear negotiator Ali Larijani met with EU foreign policy chief Javier Solana in Madrid on May 31. The two sides failed to break the deadlock over Tehran's nuclear program, but agreed to meet again within two weeks.

On the occasion of the IAEA board meeting, Larijani's deputy Javad Vaedi on Monday held a working session with Solana's top aid Robert Cooper. Vaedi described the meeting, which was intended to pave way for the second higher-level negotiation, as constructive.