A five-day round of United Nations climate change negotiations has kicked off in Bangkok, opening the first steps to implement the Bali Roadmap adopted at the UN Climate Change Conference on the Indonesian island resort last December.

Su Wei, the head of China Climate Change Reaction office addresses the meeting that developed countries are responsible and capable of take the lead in reducing emission against climate change.

"China suggests developed countries cut green gas houses emissions by at least 25 percent to 40 percent from the level of 1990 in the next commitment period for Kyoto Protocol."

Under the Kyoto Protocol, highly industrialized countries and countries undergoing the process of transition to a market economy have legally binding emission limitation and reduction commitments.

The Bangkok meeting is designed to advance work on the rules through which emission reduction targets of developed countries can be met.

Yvo de Boer, executive secretary of the United Nations Framework Convention on Climate Change, points out that this meeting will focus on discussing about emission reduction.

"To me, it's a bit like talking about the starting line of a marathon, but now knowing how long the marathon is going to be. If you are to decide to change the base from the current base in 1990, we would be measuring the length of the marathon."