Times Have Changed, Bring up My Star Destroyer Cannon

Relive a new life and return to Xuanyuan Kingdom ten days before traveling to another world. The most powerful technological system has awakened and must not repeat the destruction of the previous life. Golden elixir? Just missing from the drawings is a small nuclear reactor. Black keel? High-strength alloys are replaced by you. Immortal elixir? Extract bodybuilding oral liquid. Ancestor Tongtian, Xiaodongtian didn't pay personal income tax on his income, right? Yin-Yang contract? Don't you want to open the Longting tourist attraction? Take science and technology as the primary productive force and speak truth from the barrel of a gun. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.