The story always happens at mid-Autumn Festival, with a huge amount of seabirds barking, a highly active biological population, with a large change in temperature and air moisture during the day and night. A small insect, like a bee, grows in herds of special young bamboo, and they feed on the asphalt. After repeated fermentation of its residues in the alternation of temperature between day and night, a special fungus that resembles corals, antlers, gels and translucents grows. This is a purely natural wild bamboo nest with very little production. It is produced by insects and by bamboo; it kills by insects, it kills by insects and it co-existes. The ecological conditions such as the natural environment and climate required for the growth of bamboo swallows ' nests are so severe that they cannot be planted manually。
