He Guipin picks a plant sample during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023. (PHOTO / XINHUA)

Gaoligongshan mountains, where about 17 percent of China's higher plants species, 30 percent of mammal species and over 35 percent of birds species are found, is an important showcase of the country's biodiversity protection. In 2011, the Nujiang Golden Monkey, the fifth golden monkey species in the world, was also found here.

He Guipin, a ranger of the Lushui branch of the Gaoligongshan national nature reserve, has been doing the work for 28 years, during which he patrols the forest, prevents the forest fire, and combats with illegal loggers and hunters.

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In the protection of rangers like He Guipin, the ecological environment of the nature reserve has been improved gradually, and over 600 new animal and plant species have been discovered here since 1980.

"That's the meaning of our work," said He Guipin, "Although the work is tough, we protect these precious species. Our happiest moment is chatting with colleagues after a long patrol journey."

Rangers examine an infrared camera during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023.  (PHOTO / XINHUA)

Rangers arrange their backpacks before a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin (front) leads colleagues during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers rest beside a bonfire during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers set an infrared camera during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023. (PHOTO / XINHUA)

He Guipin (right) checks the trail of Phayre's leaf monkeys recorded by his colleague during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin (front) picks up a berry which is the favorite of Nujiang Golden Monkey during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin (front) leads colleagues during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023.  (PHOTO / XINHUA)

Rangers put up a shelter during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin (left) checks the injured eye of a colleague during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers rest inside a shelter during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

A ranger records the activity of monkeys during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

This aerial photo taken on July 9, 2023 shows rangers during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province. (PHOTO / XINHUA)

He Guipin (1st right) and his colleagues are seen during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers slide down a cliff with help of branches during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin walks past a cable bridge during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

He Guipin (2nd left) and his colleagues pose for a photo beside a bonfire at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

This photo taken on July 8, 2023 shows a Nujiang Golden Monkey discovered at the Gaoligongshan national nature reserve in southwest China's Yunnan province. (PHOTO / XINHUA)

Rangers are seen during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

This combination photo taken on July 10, 2023 shows wild mushrooms at the Gaoligongshan national nature reserve in southwest China's Yunnan province. (PHOTO / XINHUA)

Rangers are seen during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023. (PHOTO / XINHUA)

Rangers check images captured by an infrared camera during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023. (PHOTO / XINHUA)

Rangers put up a shelter during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers help each other cross a river during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 9, 2023. (PHOTO / XINHUA)

He Guipin prepares to climb a cliff during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers set a bonfire during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

Rangers cook and dry their clothes beside a bonfire during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)

This photo taken on July 8, 2023 shows a flying squirrel at the Gaoligongshan national nature reserve in southwest China's Yunnan province. (PHOTO / XINHUA)

Rangers help each other cross a river during a patrol at the Gaoligongshan national nature reserve in southwest China's Yunnan province, July 8, 2023. (PHOTO / XINHUA)