Primitive Infrastructure, Picked up and Taken Home by the Fox-Eared Girl at the Beginning

Traveling across the primitive continent, there was a snowstorm at the beginning, and I was saved by a group of cute fox-eared girls who were about to starve to death. Looking at the last piece of raw meat they handed over and the despair of the cannibals approaching the city, Lu Yan, the UP master of the craft area, smiled. Bite! The civilization infrastructure system is activated! Light the fire, reward stamina potions, and trap drawings! Fire pottery and be rewarded with city defense blueprints and herbal encyclopedia! Smelting bronze, rewards... When the red-skinned troll army came to the city and prepared to slaughter my tribe, what they saw was an obsidian barrier, an army of gleaming spears, and each beast-eared girl carrying a bowl of steaming broth. The cannibal leader was completely confused: "Didn't the intelligence say that there is only one primitive tribe here that is about to become extinct? What's going on with your impregnable imperial fortress?!" Lu Yan stood on the city wall carrying a giant axe, overlooking the trembling barbarian army at his feet, and grinned. "Welcome to... The Industrial Revolution."