Sui and Tang Dynasties: a Camera Was Introduced at the Beginning!

Traveling back to the last years of the Sui Dynasty, because he had the evidence of Li Yuan's rebellion, he was framed by the spies placed by Li Yuan around Yang Guang, and was imprisoned, waiting to be executed? It doesn't matter, I have a system. My system allows for the purchase of various digital devices. A camera and dynamic screensaver were shocked to be auspicious! A bug that eavesdrops on the messages of the emperor, his concubine, and everyone else! A monitor to steal all the enemy's movements! An unmanned aerial vehicle, the Turkic army was played by me in the midst of applause! … The digital devices that the modern world turns a blind eye to caused a bloody storm in the Sui and Tang Dynasties! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.