Noise Monitor: Do Not Respond at Zero Decibels

At one o'clock in the morning, Cheng Li received a noise complaint. The location of the complaint was an underground shopping mall that had been out of use for seven years, and the content of the complaint was that it was too quiet. There was no sound of wind, no footsteps, and even a coin falling to the ground was silent. The number on the sound level meter dropped all the way, and finally stopped at the impossible "0.0". Then, Cheng Li heard his own voice deep in his ear bones: "Cheng Li." He didn't answer. From that day on, the city's noise map began to show blank spots. The swallowed barks, brakes, cries and names spelled out something hatching in the darkness. Others think the city is too noisy. Cheng Li must let the city continue to make noise. Because the moment zero decibel arrives, the most dangerous thing is not being unable to hear. There is something in the darkness using your voice, waiting for your answer.