Listen to the Wind in the Deep Sea

At a depth of 2,800 meters in the South China Sea, something woke up. Lin Shen is the chief acoustic engineer of the "Wind Listening System" of the National Deep Sea Exploration Project. Her job is to monitor everything on the seabed - submarines, whale songs, and geological micro-movements. She was used to working the night shift alone, and was used to the system filing all unknown signals as "geological noise." Until that early morning, a waveform that had never been seen before appeared on the screen. It is not in any known voiceprint library. It occurs every few days, with increasingly shorter intervals and greater intensity. It was like something was walking towards her step by step from the depths of the sea. Lin Shen decided to go down and have a look.