Bacteria Queen

Gu Yan Mu Chan is barely holding on. Her small restaurant is on the verge of bankruptcy, the landlord is blocking the door demanding rent, and her husband lies severely injured in the ICU, with the bills making even breathing feel like a luxury. One day, she dumped a bucket of swill into the hospital's back alley garbage pit—just an ordinary action, yet it made the nearly extinct 'slime civilization' in the microscopic world worship her as a savior descending from the heavens. A silver ring formed from mycelium coiled around her fingertip, and a cold voice in her skull announced: initial binding complete. From then on, she gained the ability to traverse the microscopic world, and later unlocked rifts leading to ancient times. While others use cheat codes to conquer the world, she uses microbes to cure an ancient imperial concubine's constipation in exchange for gold bars, and brings back the yeast from a century-old imperial wine workshop to brew a priceless vintage in modern times. Her restaurant went from having no customers to requiring reservations three months in advance, and her husband in the ICU began showing brainwave responses due to the active mycelium she brought back each time. However, the system upgrades are slowing down, the civil war among the microbial tribes is affecting her ingredient supply chain, and ancient nobles are reverse-tracking the modern era through items she left behind. And the silver pattern on her left fingertip seems to be more than just a gift—three worlds are pressing down on her simultaneously, and this time, no swill bucket from the heavens will save her. — Description from novelcodex.org