After Being Demoted to the Group at the Beginning, I Awakened to the Sign-In System

I am originally a modern person, but once I traveled to the parallel world and became the eldest son of the Qin Dynasty, Fusu, I was demoted to the county at the beginning. In this Great Qin, which is different from the history I know, I seem to be in a desperate situation, but I find that I have a sign-in system. Sign in every day to get 21st century resources. With these, I gradually gained military power in Shangjun. I want to return to Xianyang to promote the establishment of the crown prince, suppress the rebellious parties, and eliminate the remnants of the Six Kingdoms. I also want to use new inventions to unify my thoughts, develop people's livelihood, lead Qin's cavalry to conquer the world, and write my own legend. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.