My Fortress Is Blocking the Bridge, Why Did You Come?

"The End of the World: I Level Up Alone with the Invincible Fortress" On the first day of college, Yunhe felt something was not good. Something seemed to be threatening his wonderful college life. —— [Number of days remaining for Scorched Earth World invasion: 3] [Warm reminder: Remember to delete your browser history] "So that's it, it's the end of the world, let me have another bite of food, and then I'll save the world." —— [Number of days remaining for Scorched Earth World invasion: 2] [Friendly reminder: Please stop eating and start upgrading the fortress. This is no joke! "My senior sister invited me to a buffet and also invited me to a dance. Is there any reason why I shouldn't go?" "I know the upgrade is coming, just go back and wait for the notification," —— [Number of days remaining for Scorched Earth World invasion: 1] [Crisis Warning: Host and human beings were observed engaging in 'dating' activities] [SOS: The portal connecting to Blue Star is opening, and a large number of alien creatures have been detected] "Stop arguing, didn't you see that senior sister is confessing her love to me?" —— [Number of days remaining for Scorched Earth World invasion: 0] [Situation Judgment: Creatures from another world arrive at the portal. The host sleeps like a dead pig [Future prediction: Doomsday] [Unintelligible: An unknown building was detected at the portal] "A bunch of bugs rushed towards my fortress early in the morning. I thought it was a speed bump." … My name is Su Muqing, and I am a reborn person. In my last life, I died in the seventh year of my arrival in the Scorched Earth World. After resurrecting my life, I decided to use everything I knew about the Scorched Earth World to help Yunhe build a fortress to resist alien creations. "Eh? Your fortress is at full level, so what use do I have?"