China has joined more than 190 other nations attending the opening day of UN climate talks in Cancun, Mexico.

The two-week conference aims to tackle a range of issues dividing developed and developing economies. Around 15-thousand government delegates, environmentalists, business leaders, journalists and others are attending the meeting.

China's chief climate negotiator, Xie Zhenhua, stressed China will play a constructive role at the conference. He added that the meeting should uphold the principle of "common, but differentiated responsibilities" and developed countries should shoulder the responsibility for their cumulative emissions.

(CCTV December 1, 2010)