参考答案： Since the 1990's, climate problems have become a global concern as a topic on the world political agenda. Climate negotiations in the past 20 years have ended in a complicated situation of political game on climate, and the differentiation of the interest subjects and the extension of the theme of the game have become a global dilemma in the political cooperation on climate. Under such circumstances, China should respond with the following strategic choices: 1. taking the initiative in our own hands and sticking to low-carbon emission development; 2. making active responses and striving for a bigger say; and 3. taking an extensive participation, and trying to reform the game rule.