Zhang Yaping, vice president of the Chinese Academy of Sciences (CAS) speaks at a press conference in Kunming, southwest China's Yunnan Province, Oct. 10, 2021. Ahead of the 15th meeting of the Conference of the Parties to the UN Convention on Biological Diversity (COP15) in Kunming, CAS held an event on its biodiversity preservation and study, as well as achievements on biodiversity research. [Photo by Jin Liwang/Xinhua]