Developed countries have requested developing nations, including China and India, to make similar commitments to reduce carbon emissions, but developing countries insist that rich countries should first make deep cuts in emissions and provide financial and technological support.

"The Copenhagen summit will not be an end for the negotiations. The real fight starts after that," said Yi Xianliang, an official from the Ministry of Foreign Affairs, who is also a member of the Chinese delegation.

The report also said that China, with its growing population and low level of industrialization and urbanization, cannot afford to make a legally binding commitment for a reduction target of carbon emissions, nor an accurate peak time for its greenhouse gas emissions.

But China can still make a voluntary commitment, such as the carbon intensity reduction mentioned in President Hu Jintao's speech delivered to the UN climate summit last month in New York, said the report.

It also proposed that China should accept a carbon emission reduction target on the condition that developed countries provide quantifiable technological and financial aids.