A member of China's 35th research expedition takes the sample from a snow pit in Antarctica, Dec. 20, 2018. (Xinhua/Liu Shiping)
A member of China's 35th research expedition takes the sample from a snow pit in Antarctica, Dec. 20, 2018. (Xinhua/Liu Shiping)
Aerial photo taken on Dec. 19, 2018 shows two inland expedition teams Taishan and Kunlun of China's 35th research expedition in Antarctica. (Xinhua/Liu Shiping)
A member of China's 35th research expedition takes the sample from a snow pit in Antarctica, Dec. 20, 2018. (Xinhua/Liu Shiping)
A member of China's 35th research expedition takes the sample from a snow pit in Antarctica, Dec. 20, 2018. (Xinhua/Liu Shiping)