Photos show the scenery of fireflies glowing in the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences (CAS) in Mengla County, Xishuangbanna Dai Autonomous Prefecture, southwest China's Yunnan Province. (Credit to CCTV)

Photos show the scenery of fireflies glowing in the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences (CAS) in Mengla County, Xishuangbanna Dai Autonomous Prefecture, southwest China's Yunnan Province. (Credit to CCTV)

Photos show the scenery of fireflies glowing in the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences (CAS) in Mengla County, Xishuangbanna Dai Autonomous Prefecture, southwest China's Yunnan Province. (Credit to CCTV)

Photos show the scenery of fireflies glowing in the Xishuangbanna Tropical Botanical Garden of the Chinese Academy of Sciences (CAS) in Mengla County, Xishuangbanna Dai Autonomous Prefecture, southwest China's Yunnan Province. (Credit to CCTV)