Start with a Map of the Great Wall. I Am the Emperor in the North.

[System] [Struggle] [Farming] [Invincible] [Value] [Single Arms] After traveling to the "Frost Baron" in the northernmost territory of the empire, Lin En faced not only the howling tundra cold wind and the almost nonexistent ruined villages. Around him, enemies are waiting: Viking warships break through the ice sea, setting off a bloody storm; above the snowfield, the shadow cast by the frost giant blocks the sun and the moon; cunning direwolves and psychic snow fox tribes are waiting for opportunities; legendary corpses resurrect from unknown corners; deep in the dark mountains, there are more terrifying existences from the mythical era lurking... "Hell, that's all." Lin En possesses the semi-activated "Civilization: One Emperor through the Ages" system, and the only thing that lights up is the miraculous improvement blueprint called "The Great Wall". "The Great Wall starts from here!" … When the war in the empire spread to the north, the dragon dormant in the cold winter finally woke up. Under the towering "Beijing Pass", the army swarmed out. Lin En raised the battle flag high, and his cold voice echoed through the sky: "Follow me, King Qin, and come to your side!" "Let those maggots huddled in their warm cozy nests feel the thunder from the extremely cold north!" When Lin En sat on the throne of the Emperor, he suddenly realized that this was just the beginning. Ragnarok has arrived, lava is gushing out, dragons are coming, the abyss is roaring, snow is falling in March, corpses are resurrected, and the world is collapsing. "You're right, but this is your archer grandpa. It relies on numbers, formation, operation, and technique. It has low values, is afraid of getting close, has a weak version, and has no mechanism."