Chapter 1155: Peeping at the Source of Decay, Shelter Upgrade 2

"Not this? What's that?"

Wu Wei frowned, his face pale.

As time passed, the sense of danger in Wu Wei's heart grew stronger and stronger. Now, it was so strong that Wu Wei could not breathe smoothly.

At this moment, Wu Wei seemed to be trapped on the train track and could not move. He could already hear the roar of the train approaching.

In such a situation, the sense of crisis would make people lose their minds.

Fortunately, Wu Wei had been through a lot along the way, so he could still maintain some rationality in the face of such a situation.

"Calm down, calm down. Don't be nervous. Think about it carefully. The reward of 600 million points, 1 billion, 1 billion, right!"

Wu Wei suddenly remembered that the third condition to upgrade a shelter was 1 billion points.

Could it be that the solution now was to upgrade the shelter?

Was this reliable?

Didn't he have to go through a trial to upgrade a shelter?