File photo taken in June 2020 shows Yin Kaipu taking pictures during a scientific research in Maoxian County, southwest China's Sichuan Province. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Yin Kaipu/Handout via Xinhua)

Aerial photo taken on Nov. 6, 2018 shows the stunning view of Jiuzhaigou scenic spot in southwest China's Sichuan Province. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Xinhua/Liu Kun)

Aerial photo taken on Nov. 6, 2018 shows the stunning view of Jiuzhaigou scenic spot in southwest China's Sichuan Province. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Xinhua/Liu Kun)

Yin Kaipu introduces his book in Chengdu, southwest China's Sichuan Province, Oct. 2, 2021. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Xinhua/Liu Kun)

File photo taken in 1972 shows Yin Kaipu (3rd L) working with his colleagues in Dege County, southwest China's Sichuan Province. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Yin Kaipu/Handout via Xinhua)

File photo taken in 1963 shows Yin Kaipu (R) working with his colleague during a vegetation investigation in Xuyong County, southwest China's Sichuan Province. Yin, a 78-year-old renowned ecologist in China, has been dedicating himself to biodiversity protection for more than six decades. After graduating from school in 1960, Yin worked at the Chengdu Institute of Biology of the Chinese Academy of Sciences (CAS), mainly engaging in biological resources investigation and conservation. In 1978, Yin proposed to establish the Jiuzhaigou and Yading nature reserves to prevent them from being destroyed. Nowadays, Jiuzhaigou and Daocheng Yading have become famous scenic spots. (Yin Kaipu/Handout via Xinhua)