Is My Empire About to Collapse?

This is the story of an overworked Earthling who transmigrates to another world and becomes an emperor. Blue Star has technology comparable to Earth's 1930s and 1940s. Wang Hao (Ji Hao) has just transmigrated into the body of the emperor of the Great Yan Empire. He hasn't even had a chance to establish his imperial harem, and the empire is on the verge of collapse, with enemy fleets about to attack!

This is the story of a transmigrator who uses the System to turn the nation around and restore the empire to greatness.