Jewel Mountain's day and night

"This recording is about a day living in Jewel Mountain: a small city mountain joust located in Hangzhou, China. I met a cat in the night and cicadas remain happily during the night. The next morning I just walked around the mountain and cicadas were  still happily and loudly singing, and I was just wondering how they perceived day and night compared to humans."

Recorded by Ryan Chiang.