Core Viewpoint - The biodiversity of Hainan's tropical rainforest has significantly increased due to the ongoing construction of the Hainan Tropical Rainforest National Park [9]. Group 1 - The Hainan Tropical Rainforest National Park is enhancing the biodiversity of the region [9]. - Various unique species, such as the bamboo stick insect and the broad-bellied bug, have been documented in the Qiongzhong rainforest [3][5]. - The presence of the nationally protected species, Hainan tiger, has been observed foraging in the rainforest [9].