[1][2] It is located deep between the mountains of Hainan Island and so far scientists have not properly explored it.

The Kadoorie Conservation China Department (KCC) conducted a pilot study in 2003 and was stunned by the size of the primary rainforest and its rich biodiversity.

[3] In 2016, two new species of plants were discovered, which were found only in the Yinggeling National Nature Reserve, namely Cladopus yinggelingensis and Terniopsis daoyinensis.

[4] Rhacophorus yinggelingensis, the Yinggeling treefrog, is only known from the Yinggeling National Nature Reserve where it occurs in rainforest at elevations of 1,300 and 1,550 m (4,270 and 5,090 ft).

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