"Indeed, climate change is a global challenge. We are certainly ready to take part in international cooperation on climate change. But honestly, political climate also has an impact on the efforts to deal with the natural climate. When there is insufficient mutual confidence, mutual trust, mutual respect, how can we work together to confront such a global challenge? I don't think it's quite possible. Even for climate change itself, how will the U.S. and Western countries face their historical responsibility ever since industrialization? How will they shoulder their responsibility to help the developing countries to deal with this challenge? They still have to take actions. They still have to prove they are seriously committed. They are earnest about their international obligations. They still have to prove their sincerity."