Congressman Wang Guangtao chairs China's Environment & Resources Protection Committee and is the architect of China's climate legislation. He is also very close to the small team that will eventually negotiate China's position at the UN's climate change conference in Copenhagen.

In an exclusive interview Newsnight's Susan Watts asked him what China is looking for from developed countries before it will sign a deal.

Watch Susan Watt's film on the crucial talks paving the way to Copenhagen on Newsnight on Thursday 29 October at 10.30pm on BBC Two.