Use Energy to Drive Mechas

In this era, the appearance of alien beasts caused the world to overturn, and humans retreated to their last home, the "Star Ring." Firearms, artillery, source energy, and mechas build a new future. When Xu Yuan, who accidentally traveled through time, ventured out to mine for survival, and when people were still trying their best to survive, Everyone is saying this is the worst of times. But a few years later, when he was driving a mecha and leading thousands of troops to counterattack, he heard countless people chanting his name. Xu Yuan knew that this was his time.