MTL - Sweet Beauty - Chapter 34 respectively

The Supernatural era descended, the rules changed, mystery arrived, and the world altered. Countless ruins of civilization emerged, and an abundance of Heavenly Materials and Earthly Treasures lay at everyone’s fingertips. Radical faction, “This is the best of times, entering a new world, excavating relics, mass evolution!” Conservative, “This is the worst of times, with countless monsters outside, once you leave the Safe Zone, extinction awaits humanity!” … Meanwhile, at a remote ruin, Lu Yuan successfully discovered new treasures and sought after the mysterious wealth, desperately trying to contact his fellow Earthlings. “Found a communicator, can it get through?” “Hey, humans—I’m almost becoming a god, and you’re still hiding in the Safe Zone?”

Lu Lingxi died.

As a child born by his parents through precise genetic matching, for eighteen years of his life, he lived entirely for his brother, who had leukaemia. He was his brother’s shadow, a “medicine reserve bank” for his brother’s treatment needs.

Umbilical cord blood, stem cells, bone marrow… whenever his brother needed it, he would have no choice but to quietly lie on the operating table.

Until the last time, when his brother needed a kidney and he never came off the operating table.

When he opened his eyes again, Lu Lingxi became a teenager with the same name Lu Lingxi.

Freed from the shackles of his fate, he possesses the mysterious ability to communicate with plants.

Raising flowers, gardening and running a farm, Lu Lingxi begins a very different life!

With the revival of spiritual energy and the breakdown of the order of species, it is a difficult test whether human beings can still stand at the top of the biological chain.

(There is already an old book, The Strongest Descends in the City, you can read it.)

- Description from novelbuddy