Ways and Tools of the Starry Vault

In the 23rd century, humanity was divided into the Chinese Alliance and the Olympus Federation. The protagonist Mo Zhai and his adoptive brother Xun Shen went from fighting side by side to having a ideological break: Mo Zhai used the defensive mecha "Universal Love" to protect civilians, while Xun Shen used the heavy mecha "Controlling Destiny" to fight powerful enemies. The war escalated to the point where the Federation launched the "Emperor System" in an attempt to exterminate humanity. The two brothers reunited at the end of the day and realized that "ideals need power to protect them, and power needs ideal guidance." They merged into the ultimate mecha "Tianxia" and used themselves to detonate the "Emperor System" to give civilization a new lease of life. The story uses sacrifice to interpret the future of "harmony in diversity, and shared destiny".