Beijing and other parties' mediation efforts will create opportunities for resumption of the Six-Party Talks, which have been suspended since 2009, but this will take time, observers said.
Through diplomatic exchanges, Beijing has played an active role to draw all parties back to the Six-Party Talks, said Huang Youfu, a professor on Korean studies at the Minzu University of China.
"When the US-ROK joint military drill ends later this month, Pyongyang will temporarily have no excuse to continue its strong words, so there will be more room for diplomatic talks, and the possibility of communication will increase", he said.
Charles Armstrong, director of Columbia University's Center for Korean Research, said that Wu's visit "is clearly intended to mediate between North Korea and the US. There has been a lot of tough talks on both sides, but dialogue is the only realistic way forward."
Armstrong believes there's a strong likelihood the Six-Party Talks will resume, possibly by summer, but it's unlikely that it could happen immediately, after such a heated period of confrontation.
Shi Yuanhua, director of the Center for Korean Studies under the Institute of International Studies of Fudan University in Shanghai, said Pyongyang and Washington were likely to resume bilateral communication because both sides have the will to do so.
"But the negotiations between Washington and Pyongyang could be very difficult because neither side will give up its initial stance", he added.
Meanwhile, Scott Snyder, a senior fellow in Korean studies at the Council on Foreign Relations, called for more communication on DPRK issues between China and the US.
"We have a very difficult issue on our hands that has only gotten worse. Many people in Washington have expectations that cooperation with China is necessary to manage and solve the current problems, but I think in Beijing there are expectations that the US must take a proactive stance to manage and solve the current problems.
"Probably both sides will have to work more closely together in order to solve these problems," Snyder said.
Quake response hailed
Representing the ROK government, Yun also expressed deep condolences over China's casualties and losses brought by the earthquake in Lushan, Sichuan province.
He spoke highly of the Chinese government's outstanding leadership during the earthquake relief work and offered $1 million to China on behalf of the ROK government.
Li expressed gratitude for the condolences and help from the ROK and again showed appreciation for international support and aid for earthquake relief and reconstruction.
Giant pandas safe in quake-hit zone