Aerial photo taken on June 5, 2022 shows the group photo of rangers of Pengzhou management and protection station of Giant Panda National Park (from L to R) Song Ziqiang, Hu Xianhua, Yang Yuanze, Zhou Chuanjun, Yang Yuanfu, Liu Zhibo, Yang Chengjian, Li Dequan, Lai Yongxiang and Wang Chaoqing on their patrol in the national nature reserve of Baishui River in southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

Song Ziqiang, 53, a ranger at the Pengzhou management and protection station of the Giant Panda National Park, has been working in giant panda protection for 21 years.

According to Song, the rangers should carry out biodiversity monitoring, infrared camera maintenance, and also need to check geological disasters and other situations. Rangers also look for traces of giant pandas and observe their activities. They collect giant pandas' footprints and feces as specimens for analysis. 

Song Ziqiang, a ranger of  Pengzhou management and protection station of Giant Panda National Park, patrols in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 4, 2022. (Xinhua/Jiang Hongjing)

Rangers of Pengzhou management and protection station of Giant Panda National Park take a rest during their patrol in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 4, 2022. (Xinhua/Jiang Hongjing)

Song Ziqiang, Liu Zhibo and Zhou Chuanjun (L to R), rangers of Pengzhou management and protection station of Giant Panda National Park, check an infrared camera in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 5, 2022. (Xinhua/Jiang Hongjing)

Aerial photo taken on June 4, 2022 shows rangers of Pengzhou management and protection station of Giant Panda National Park patrolling in the national nature reserve of Baishui River in southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

Rangers of Pengzhou management and protection station of Giant Panda National Park set up a camp in the rain in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 3, 2022. (Xinhua/Jiang Hongjing)

Rangers of Pengzhou management and protection station of Giant Panda National Park patrol in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 4, 2022. (Xinhua/Jiang Hongjing)

Combo photo shows images of giant pandas captured by infrared cameras on Dec. 2012 (up) and Feb. 2018 at the Giant Panda National Park in southwest China's Sichuan Province. (Xinhua)

Combo photo shows images of animals captured by infrared cameras at the Giant Panda National Park in southwest China's Sichuan Province. (Xinhua)

Song Ziqiang, a ranger of Pengzhou management and protection station of Giant Panda National Park, discusses the patrol route with his colleagues at the camp in the national nature reserve of Baishui River in southwest China's Sichuan Province, June 4, 2022. (Xinhua/Jiang Hongjing)