Fireflies fly in the air at the Linggu Temple in Nanjing city, East China's Jiangsu province, July 16, 2015. [Photo/Xinhua]

Firefly season

Minor Heat is the season when fireflies become lively. Zhu Shuzhen, a woman of the Southern Song Dynasty (1127-1279), once described in her famous poem Summer Fireflies a happy scene of children playing with fireflies in the woods at night.