The eggs laid by cicadas hatch into young cicadas after half a month. Cicada has a very long life. The shortest is to live underground for 2-3 years, usually 4-5 years, and the longest is 17 years. Young cicadas live underground for a long time, which is warm in winter and cool in summer. There are few threats from natural enemies, but they are also very comfortable. After molting for 4-5 times, they have to drill out of the ground, climb the branches, and molt in turn (called cicada molting) to become adults.

What puzzles entomologists is that cicadas can accurately determine the time, complete the transition from larvae to adults in "hell" and climb out of the ground at the right time. This is an incredible miracle. Especially in 17, cicadas never existed again. To be precise, they lived in the "hell" in 17, and the light of the day was revealed. Depending on its children, it must be 17 years again. Therefore, entomologists always wait for the appearance of "17 cicada" just like astronomers wait for solar eclipse and Halley's comet. Golden cicada, also known as cicada and black cicada, nymph, commonly known as cicada turtle, is a representative species of cicada. Distributed in Henan, Hebei, Shandong, Anhui and other places in China. Through research, it is found that golden cicada likes broad-leaved trees with soft wood and more juice, such as hawthorn, peach tree, apple and pear tree. Woody species, such as paulownia, willow and elm, are all species they like to inhabit and feed on. It usually takes 3-5 years for the wild golden cicada to complete its first generation. Artificial propagation can shorten the growth cycle to about 18 months. The mature nymph of golden cicada emerges from the soil from late May to late August, and molts and emerges as an adult.