Light does not only exist in nature, it can be artificial too. The fireflies' flash is their language of love, but eye-dazzling neon lights can throw the signals of fireflies into disarray. In Nanjing's rainy season, do fireflies worry about the artificial lights?

Watch more:

Fireflies episode 6: Outshining rivals 

Fireflies episode 5: The brutal larvae

Fireflies episode 4: The secret of light

Fireflies episode 3: The hunting world

Fireflies episode 2: The master of disguise

Fireflies episode 1: The hostile forest for the fireflies

(Cover image designed by CGTN's Li Yueyun. Photo credits to CGTN's Qu Bo.)

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