Chinese negotiators have started a new round of campaigning in their battle to secure a meaningful climate change deal at the upcoming Copenhagen summit.

The nation's top climate change negotiators said Beijing will not accept an empty political declaration at the summit next month. Instead, the country will settle for nothing less than a global deal with "substantial content".

Yu Qingtai, China's climate ambassador, said any deal should lock in achievements already made during the two years of negotiations that have already taken place in the run-up to the Copenhagen conference.