Yichao

In AD 2157, the Age of Gray Fog broke out. A meteorite carrying ancient saprotrophic bacteria hit the earth, completely contaminating the air, soil, and water sources. Ordinary humans will be distorted, dissolved, and alienated into monsters upon contact. Human beings hide in domes, underground fortresses, and wasteland ships, relying on biotechnology - the Yinest to survive. Yi Nest: A living symbiotic tissue cultivated through genetic engineering that parasitizes the human body, resists pollution, strengthens the body, and provides weapons.