Chapter 438: Chapter 438: The Greatest Trust

Su Bai carefully observed the hot air balloon, from the basket that would carry people to the balloon that would expand.

He also examined the heating device in the middle of the hot air balloon, inspecting each component with great attention to each detail.

After all, in this Primitive Era, he was the only one who truly understood how hot air balloons worked, so he had to take full responsibility if there were any faults. If the hot air balloon were to malfunction and fall, the consequences should be all on his shoulders.