After Transmigrating to a Primitive Continent, I Started Farming and Building Infrastructure

[Upcoming story: "I Transmigrated to the Middle Ages and Became a Famous Doctor [Cthulhu]"] After Li Chen enters a primeval forest as part of an expedition team, he gets separated from his teammates. What he doesn't expect is to stumble into a primitive world. Hunting depends on stone tools, and farming depends entirely on the weather. There's water to cross and fire to brave, not to mention threats from savage beasts and war. When Li Chen sees the appallingly high rate of infant mortality among the tribe's barbarians, he simply can't stand by. "You have to boil water before drinking it!" "Hey, you can't just relieve yourselves anywhere! Use the latrine!" "Clear the weeds and fertilize the soil before sowing..." His endless rules leave the tribespeople grumbling. They want nothing more than to beat this weakling Li Chen to a pulp. And then... they can't get enough of it. The first time Lie Gu saw Li Chen, he thought Li Chen was handsome. Li Chen's pheromones nearly shattered his self-control. But Lie Gu's rationality was almost merciless. He thought he just needed to satisfy a physical urge, nothing more. Then he decided to take Li Chen back to the tribe. His priorities were: Tribespeople > himself > Li Chen > everyone else. Later... Li Chen, Li Chen, Li Chen, Li Chen, Li Chen... Tribespeople: ???! Warnings: 1. Primitive-world development and ABO. 2. The intelligence of characters A, B, C, and D will be lowered to some extent. A righteous, upstanding socialist successor as the shou X a savage, strong, violent barbarian as the gong. Upcoming story: "I Transmigrated to the Middle Ages and Became a Famous Doctor [Cthulhu]" Blurb: After getting off the plane, Li Wei heads straight to the clinic he rented in advance, only to find that its furnishings are very old-fashioned. When he steps back outside, he discovers that the people on the street are dressed in equally old-fashioned clothes. There are no cars, and only the nobility have money to spare for electric lights. With his black hair, dark eyes, and East Asian features, he sticks out like a sore thumb in this era. In this long, dark age... mysterious creatures exist in the darkness, beyond the sight of ordinary people. Character profiles: Li Wei Occupation: Doctor, cultivator Other: To be added Duke Ackerman King Selibia Occupation: Night Watchman, city lord Other: To be added Historical setting: Roughly the period around the end of the Yuan dynasty and the beginning of the Ming dynasty in China, about a hundred years after Marco Polo returned to Europe. There are no electric lights at this time, though they appear in the story. This is an alternate setting, and everything exists to serve the plot. Anything unusual in the story is my own invention. References: The Cthulhu Mythos, The Necronomicon, Douban's beginner's reading list for the Cthulhu Mythos, Call of Cthulhu tabletop roleplaying (more references to be added) Theme: Find your truest self in hardship, and never give up