I Have a Door Through Time and Space

After being exiled to an abandoned planet, Shi Yu discovered a gate in his dilapidated base that could take him to all kinds of other worlds. A war-torn world where people could only chew tree bark, an ancient world flourishing with poetry; a world of elves with extraordinarily abundant mineral resources, and a mighty xianxia world where people cultivate the Way of the sword... Shi Yu traded goods from one world to another. You have nothing to eat? Sure, I'll sell you rabbits from my wasteland planet. They can even improve your physique. All you have to do is trade me soil. Your path to officialdom looks bleak? Sure, I'll sell you the 72 Strategies for Flood Control and the 36 Ways to Increase the Rice Harvest. In return, I want one piece of calligraphy from each of you. No fighting over it, there's enough for everyone! He bought jewels from the elves, immortal swords from his fellow cultivators, and... Shi Yu had only wanted to make ends meet, but in the end, he used everything he'd traded for to turn this abandoned planet into the most beautiful planet in the universe. Legend has it that Riwu Star has the most fertile soil in the universe, and is home to landscape poetry and calligraphy treasured by the ancient people of Blue Star. The ground in its capital is paved entirely with rare jewels, and its main mode of transport is the fashionable yet retro immortal sword. Shi Yu is Riwu Star's greatest planetary lord, a god worshipped by all its people! And across the other worlds, the legends of Shi Yu will live on forever. Theme: Help others