What does "cicada" mean in ancient jade articles?

Each period has its own meaning. Jade cicada in Han Dynasty is one of the nine orifices, which is contained in the mouth, meaning to break the cocoon and be reborn. At that time, Buddhist teachings had not yet been introduced into China, and beliefs still mostly came from fairy dharma. The ancients believed that the dead could make the soul immortal. Later, I learned that this shape appeared on jade is a blockbuster.