Delegates pose for a group photo during the Pre-COP23 meeting at Denarau, an island near Fiji's third largest city of Nadi, on Oct. 17, 2017. A total of 300 delegates from over 60 countries and regions, international institutions, civil society organizations and business leaders are gathering here to attend the two-day conference, namely Pre-COP 23, which officially started here on Tuesday. (Xinhua/Zhang Yongxing)