Let you recycle scrap metal and bring back a 10,000-ton battleship

Introduction: Luo Feng accidentally discovers a portal leading to a planet in another world. This is a ruins after the destruction of a nuclear war. All humans have died, and there is only Luo Feng on the entire planet. Fortunately, there are still countless black technology remains and resources. Ding! You find a robot. Ding! You find the lithography machine technology. Ding! You find 100 tons of gold. Ding! You find the high-tech cruiser. All in all, the entire planet belongs to Luo Feng. At the beginning, Luo Feng is a scrap steel recycler for a state-owned enterprise. When the target cannot be completed,