Save Humanity from an Isolated Island

The celestial barrier is gradually crumbling, and alien beasts are rampant in the offshore waters. The Shang State is building high energy storage walls to resist the endless tide of beasts. The time traveler Li You suffered a plane crash and was stranded on a deserted island. He was accidentally bound to the alien animal affinity part-time job system, and set off outrageous tasks one after another. Looking at the fierce and untamable female mermaid in front of him with a mouth full of sharp fangs, Li You fell into silence: Who can tell me what it means to sing a lullaby to coax strange animals to sleep?