Submit the Mothership Design at the Beginning to Build Nantianmen

In 2021, the Yutu probe discovered a mysterious spacecraft on the back of the moon. Through research, it has been determined that this spacecraft is not something that human civilization can build at this stage! In just the past five years, an alien civilization has attacked and mankind has been destroyed! Chen Changan is lucky enough to return to 2021. Facing the future of the human world, he feels deeply powerless... But at this moment, the Navigator system was activated... Chen Changan did not hesitate and handed over the design drawings of the small air and space combat platform to Daxia! What he wants is definitely not a person's survival! One year later… The Nuwa and Fuxi deep space strategic strike spacecrafts take off! Houyi and Kuafu deep space strategic star destroyer missiles were launched! The exposure of the Great Wall Project and the Nantianmen Project made Daxia stand on top of the world! When the aliens from deep space arrive, the first extraterrestrial counterattack begins! The whole world was in shock! Eagle Sauce: What did RabbitTM discover on the far side of the moon! Why is it that the technology tree is completely crooked after I return home? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.