President Hu Jintao is upbeat about the prospects for a positive outcome at the Copenhagen climate change summit in December - as long as the international community collaborates based on agreed principles and achievements made so far.

"It is essential that any result from the conference should embody the basic principles of the UN Framework Convention on Climate Change and the Kyoto Protocol and lock in the achievements of the Bali Roadmap," Hu said yesterday.

He was referring to an action plan agreed at the UN climate talks in December 2007 that kicked off the negotiations aimed at finding a broader agreement capable of expanding or replacing the Kyoto Protocol after it expires in 2012. That process is meant to conclude in Copenhagen.