Some developed countries that had failed to honor their commitments to tackle climate change are unqualified to criticize developing nations, a Chinese official said Tuesday.

Foreign Ministry spokesperson Jiang Yu made the remarks at a regular press briefing in response to a reporter's question on the accusation of China's "hijacking" of the Copenhagen climate conference.

British Energy and Climate Change Secretary Ed Miliband published an article in The Guardian newspaper on Dec. 20, saying China tried to "hijack" the Copenhagen climate conference.

Jiang said China had made arduous efforts to push forward the progress of the Copenhagen conference and adopted a series of active measures and policies in dealing with climate change.

China was second to none in terms of its attitude, intensity of actions and the achievements in addressing the issue, Jiang said.

China's voluntary emissions cut target had no strings attached and was not linked with the targets of any other country.

Taking their attitude on climate change talks into account, some developed countries that had failed to fulfill their obligations should reflect on their own conduct, Jiang said.

She said China expected all parties to take the Copenhagen conference as a new starting point, build further consensus, enhance cooperation and fulfill their own commitments, so as to complete the negotiations of the Bali Roadmap and promote a continuous progress of the international climate change cooperation.