Hainan black-crested gibbons, listed as the world's most endangered primate species, are found only in the Hainan Tropical Rainforest National Park. 

To preserve the tropical rainforest ecosystem, residents in the core area moved out to leave an undisturbed environment for ecological restoration. The national park has researched the species and overseen regulations to conserve and rehabilitate the habitat of Hainan gibbons and other unique, rare wildlife species.

Check the video to take an adventure on China's second-largest island.

(Video via the National Forestry and Grassland Administration)

Narrator: Zhang Hao

Writer: Xing Fangyu

Copy editors: Yang Yan, Zhu Yingming

Video editor: Liu Haibo

Cover image designer: Feng Yuan 

For more of "China's National Park" series: 

China's National Park: They are beloved by the world

China's National Park: Sanjiangyuan deserves protection for all our sakes

China's National Park: Reclaim the vast living space of rare beasts

(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)