You Promised to Cultivate Immortality, Why Do You Take Out the Truth?

In 3000 AD, a brilliant stream of light fell into the black and yellow earth. The ancient planet ushered in unknown evolution, and strange beasts that only existed in myths appeared one after another. In the early days, mankind relied on the power of science and technology to build the final high wall and maintain the crumbling order. However, as more ancient and terrifying existences descended one after another, human pride was vulnerable to absolute power. In 3100 AD, the last alliance collapsed, and civilization fell silent amidst the roar of beasts. Blue Star has entered the era of alien beasts. "My name is Liu Yi, a person whose life should end at the end of the world." "The system saved me and sent me to the future who knows how many years later, allowing me to live a new life as the city lord's youngest son who should have died young." "Now, what worries me is that as the lord of Changjiang City, how should we develop technology in a world where monsters and beasts are everywhere and monks are flying everywhere?"