Lu Yuanming busied himself.
Indeed, Tang Zhe'an had accurately described his personality.
Many people reveal their true character when they face desperation and despair.
For instance, some people would just squat down with their heads in their hands, waiting for death—desperation and despair having shattered all their spiritual will, leaving only the thought of death.
There are also those who would stand up and resist, roaring and howling fiercely. Not only would they attack the enemy, but they'd also lash out at those around them, even to the point of self-destructing along with everything else.
Some would fall into extreme anxiety and then do everything they can, even if those actions have nothing to do with confronting desperation and despair. They can't stop, nor do they want to, and they would also drag others around them to keep moving too.