If Zhou Tian's storage equipment could still be used, such a problem wouldn't exist. But since Zhou Tian was unable to use his storage equipment at the moment, even though he wanted to use the hot air balloon to ascend, the lumber he brought was already completely used up, leaving the hot air balloon without the power to continue flying.
Moreover, the worse situation was that Zhou Tian's hot air balloon couldn't continue ascending due to fuel reasons, and the hot air balloon he constructed at that time had significant quality issues.
Initially, Zhou Tian hadn't planned to fly very high, so at the time, even if the hot air balloon had major problems, it wouldn't affect Zhou Tian's plan. But when Zhou Tian changed his idea to continuously ascend, danger inevitably followed.
