Little Marquis of the Tang Dynasty

Travel to the Tang Dynasty with the system. I just want to be a good little dude. Unexpectedly, my father died and the housekeeper ran away. A son of an aristocratic family can only use the system to save himself. Solve strange cases, build cannons, send troops to Turks, improve the planting system, and win the title of the most beautiful flower in the literary world. "Am I dreaming?" "Master, don't leave..."