Cities, doomsday, mechas, parallel time and space, time travel, alien monsters, alien invasion.
Parallel Time and Space 2 Earth
The world is less than three years away from doomsday.
After his spiritual energy revived, Li Qingyun, who loves adventure, accidentally released Sun Ping'an, who had been sealed by himself. Then Li Qingyun experienced many bizarre things in different parallel time and space and made many friends. After experiencing life and death, Li Qingyun grew up a lot.
It's your first time writing and you have no experience, so please don't comment, thank you.
PS (any similarities are purely coincidental)