Save the World by Raising Mermaids

[Farming + Chinese dynasty + apocalyptic survival + ghosts and monsters] This is a world of people, ghosts, demons, spirits and monsters. The human race was defeated in the war between monsters and demons that lasted for thirteen years. In order to survive, the human race had no choice but to go to the sea and flee to islands. The vast land was occupied by alien races! He He started out on a desert island and awakened to the synthesis formula system of all things. "Explosive Berry" + "Bear Demon Bone" = "Fire Fork to Capture Ice Fish" "Mermaid Tears" + "Stainless Steel" = "Sword to Restrain Water Demons" "Ordinary Sea Rice" + "Blood of Salt-Tolerant Beast" + "Fusion Pill" = "Perfect Salt-Tolerant Sea Rice" … … With each formula in hand, He Xu starts from a small desert island to restore human civilization and save the world!