The following are the highlights of Chinese Premier Wen Jiabao's attendance of the UN conference on climate change in Copenhagen on Friday: Copenhagen -- Wen delivered a speech titled 'Build Consensus and Strengthen Cooperation to Advance the Historical Process of Combating Climate Change' at the opening session of the leaders' meeting of the UN climate change conference. He said a long-term perspective and a focus on the present were needed in tackling climate change. China's population of 1.3 billion presented a special difficulty in cutting emissions but it would do whatever was within its capacity to address global climate change, he added. Copenhagen -- Wen met with U.S. President Barack Obama to discuss climate change. Wen said climate change is a global challenge and an important field for cooperation between China and the United States. The key to this issue is to stick to the principle of 'common but differentiated responsibilities,' said Wen. Copenhagen -- Wen met with Indian Prime Minister Manmohan Singh and two leaders agreed to further develop the strategic cooperative partnership between their two countries. Wen said the unity, cooperation and common development of China and India, which had a collective population of 2.5 billion people, were critical for the peace, stability and prosperity of Asia. Copenhagen -- Wen left for home after attending the UN climate change conference. 