You can hear cicadas in summer. I used to think that the life track of cicadas is very simple: eggs, insects, pupae and cicadas circulate once a year. Later, I learned that most cicadas live underground, and it takes several years to mature after molting for five times. The most famous cicada is the seventeen-year cicada, which has been dormant underground for 17 years! Seventeen years of cicada poetry: seventeen years buried in the soil, seventeen years spent in silence, seventeen years spent in suffering, seventeen years spent in harsh environment. On the branch, it completed the transformation from pupa to cicada, and its wings spread very thin and flew for a long time. The seed of love is sown in the soil, and seventeen years later, it is a song "Expectation of Love" ...) Summer is about to pass, and it sends it away with the swan song of life.