President Hu Jintao has exchanged views with US President Barack Obama on bilateral ties and climate change on phone conversations Wednesday morning.

Obama expressed appreciation over China's contribution to the success of last month's G20 Pittsburgh summit. He says he is looking forward to visiting China in November and discussing issues of mutual concern with the Chinese president. Hu Jintao says China is ready to work with the US to ensure a successful visit by Obama, and further promote the positive relationship between the two countries.

On the topic of climate change, President Hu says it's essential any result of December's Copenhagen Conference should embody the basic principles of the UN Framework Convention on Climate Change and the Kyoto Protocol, and the achievements of the Bali Roadmap.