ROK, DPRK agree to hold summit in Pyongyang on Sept 18-20

The Korean Peninsula's denuclearization and the improved inter-Korean relations were also issues which Moon's special emissaries planned to discuss with the DPRK side, according to the Blue House.

The envoys were also greeted by Ri Son-gwon, chairman of the Committee for the Peaceful Reunification of the Country of the DPRK, according to Blue House press secretary Yoon Young-chan.

Wang Junsheng, a researcher from Chinese Academy of Social Sciences, said there would be no future problems for the scheduled meeting between Moon and Kim.

"Both sides have the motivation to promote the process of the summit," he said, adding that the meeting on Wednesday was mainly for the envoys to go over details such as time and location.

Wang said the ROK's move will have a positive effect, but it cannot be overrated. "If the DPRK and the United States are not well prepared, it will be hard for the ROK to mediate."

The talk also came at a time when the US and the DPRK are at odds over whether denuclearization or a step toward the normalization of the DPRK's international status by declaring the end of the 1950-53 Korean War should come first.

"The divergence between Pyongyang and Washington exists from the very beginning," he said. "Also, they lack basic trust and the interactions between them were not very pleasant."

Wang said the DPRK insists that the establishment of a peace mechanism should come first, while the US sticks to the idea that denuclearization is the precondition for other moves. But he also said the two problems can be solved at the same time by establishing two working groups.

"The key to the future direction of the peninsula lies in the DPRK-US ties," he said.

Xinhua, AP and Reuters contributed to this story.