Echoing Shi's view, Liu Jiangyong, a professor of international relations at Tsinghua University, said the argument that China's DPRK policy has failed is ill-founded.
Such arguments of some foreign media or on the internet are either provocation or have ulterior motives, he said.
China has done nothing wrong in and will stick to its position on the issue, for which the country urges a resolution through dialogue, he added.
After the DPRK's third nuclear test, Tao Wenzhao, a research fellow with the Chinese Academy of Social Sciences (CASS), said in an article that China has been criticized for keeping trade and economic relations with the DPRK, which are described as a "big loophole" of the United Nations' sanctions against the country.
As a matter of fact, he said, China has strictly adhered to relevant UN resolutions that do not demand cutting off all economic exchanges with the DPRK.
China-DPRK trade and economic relations are normal between two neighboring countries, Tao said.
"China, as a responsible stakeholder in the international community and one of the signatories to the Nuclear Non-Proliferation Treaty (NPT), bears solemn obligations for the international community in safeguarding the world's nuclear non-proliferation system," he said.
"This is also the reason why China has firmly opposed the DPRK's new nuclear test, a stance that should not be misunderstood," Tao added.
Buzzwords during 2013 Spring Festival holiday