South Korea's Foreign Minister Yun Byung-se has issued a new warning to Pyongyang: carry out a fourth nuclear test and pay an unimaginable cost.
Speaking at a forum on reunification Thursday, Yun said that the international community, including China, stands unified and is determined to denuclearize North Korea.
Yun's strong words come as members of the six-party talks continue efforts to get Pyongyang back to the negotiating table to discuss denuclearization.
Sources in Washington says,. China's top nuclear envoy Wu Dawei will visit Washington soon to discuss the outcome of his four-day trip to North Korea late last month and the possible resumption of six-party talks.
The news of Wu's visit comes a day after South Korea, the U.S. and Japan agreed to be a bit more flexible when dealing with North Korea.
The three had been previously been firm that talks would only resume if Pyongyang were to take concrete steps to end its nuclear program.
Now that the three nations appear ready to compromise, attention turns to China and its role as mediator.
China remains North Korea's biggest ally, and narrowing down the different political interests of involved parties is the biggest factor in a resumption of six-party nuclear talks with the North.
The six nation also includes Russia.
The nuclear talks have been stalled since late 2008 because of Pyongyang's repeated provocations.
Yoo Li-an, Arirang News.
And, South Korea's foreign ministry says that its new chief nuclear envoy will visit Beijing on Friday and Saturday for talks with his Chinese counterpart, Wu Dawei.
Meanwhile South Korean Defense Minister Kim Kwan-jin held a 20-minute phone conversation with U.S. Secretary of Defense Chuck Hagel on regional security cooperation with particular focus on countering threats from Pyongyang.