It's the End of the World, but My Mecha Is Still Cultivating Immortality!

The funny man slipped into the third-rate novel "Mechas are rampant in the apocalypse, so I took the opportunity to open a harem". Bind a god-level system [book-wearing + mecha + apocalypse + system + slap in the face + vest =? Chu Jiang is a strong man in the era of spiritual energy recovery. When he woke up, he found himself in a novel called "Mechas are rampant in the last days, I took the opportunity to open a harem" and was bound to a god-level system. However, he discovered that he traveled through time too early. At this time, the water is still drinkable, the meat is still edible, and people cannot wield swords or guns. This seems to be a month before the end of the world, right? In this world, in order to resist the ferocious beasts, people create mechas, namely mecha divisions, mecha soldiers and commanders. He looked at the student ID card with F-level command written on it in his hand and fell into deep thought... Damn it, I don't believe there is a system that can overturn my car! ! Ye Qingyi: Brother Chu Jiang, can you join the training with me? Zhou Zihan: Junior Chu Jiang, I can open your eyes. Lin Yaoyao: Classmate Chu Jiang, would you mind falling in love with me? Chu Jiang: Women will only affect the speed at which I draw my sword. You must be the original male lead who came to hold me back! ! (No heroine) The world I originally lived in was one of urban immortality. After traveling through time, I discovered that I could use spiritual power in mechas. He began to stock up on supplies to prepare for the coming high and low temperatures. He suddenly found that his sister's temperament changed drastically. She threw away all her princess dresses and changed her temper from the little princess in the past. She became domineering, strong and brave. Only my sister knows that she is reborn