Prince Dandy: Build a Copper-Walled and Iron Country from Scratch

Yuan Chen is very lucky to have traveled through time before graduation! Still the prince! "Great! No more papers to write! No more pawns!" Unfortunately, the palace is about to be defeated by him! Moreover, he actually kidnapped the princess and spent the night together, making firewood and fire... Not only that, there are many people who want to kill him. But he is just a useless college student who gets rich in class and then lies dead to watch dramas after class. He doesn't know anything! However, he has an inexplicable system that appears out of nowhere and inexplicably implants knowledge into his brain! From then on, we built roads and buildings, fortified cities and strengthened military forces, and indulged in debauchery...