Actually, Yun Qingyue's idea was very simple: to rescue Little Brother from the laboratory a full ten years before the story officially began, and let him do what he was meant to do ahead of time.
Although doing all this would mean missing the wonderful performances of the Iron Triangle, an immortal Little Brother, once he had settled his own affairs, could track them down in advance and help guide them. This was a tomb-raiding world to begin with; once these magical places were gone, everyone could peacefully explore normal tombs.
Since the petitioner wanted Little Brother to suffer less and get these matters resolved quickly so he could live a happy life sooner, they would strike right at the very beginning of the story.
Chapter 393