Before the End of Rebirth, I Controlled Microorganisms

Forty-eight thousand insects! Despite the advancement of science and technology, people's understanding of microorganisms is only superficial. Little is known about microorganisms, and even less about their habits. But microorganisms are always involved in human life. An imbalance of intestinal flora can lead to diarrhea. If... You could control microorganisms and become their master, what would you... Do? Jiang Chen was reborn from the apocalypse and returned to this unbroken world. He wants to protect this beautiful world, his family, wife and children...