I Save Dimensions Through Supermarket Trade

Jiang Bai received a terminal illness notice, but unexpectedly got bound to a supermarket trading System. Completing missions would cure his incurable disease.

Zombie World

A supermarket suddenly appeared near a base. People who entered discovered that it sold all kinds of goods from before the apocalypse.

Water and food that normally cost hundreds of crystal cores could be bought for just a few. Rare, hard-to-find supplies were available in exchange for an equivalent price.

Everyone went wild.

Ancient World

After years of drought, villagers abandoned their homes and land and fled in search of food.

A miracle descended from the heavens: a shop called the Trading Supermarket appeared, where people could exchange almost nothing for food and water.

Interstellar World (You can skip the first five chapters)

The universe was boundless, but overdevelopment had left countless planets barren.

A miraculous shop suddenly appeared on the StarNet, selling large quantities of precious natural food.

Mutant World

The whole world mutated, and humanity fell to the bottom of the food chain, unable to grow anywhere near as fast as plants and animals.

At a moment when they were on the brink of extinction, powerful weapons far beyond the level of current technology appeared out of nowhere.

Spiritual Qi Revival

Silent changes appeared in unnoticed corners. The world advanced to a higher dimension, and failure meant destruction.

Childhood friends pairing. I might write an extra about a cultivation world.

Theme: Change the world in small ways.