Lu Yin had indeed left. He continued casting out Divine Power Lines to locate Ancient Reversal points. Nearly half a century remained, and he was still one point short. He would turn in the work first and worry about the rest later.
Whether Ancient Reversal was right or wrong wasn't something he needed to dwell on. Either way, he couldn't put an end to it completely.
Even the Main Dao couldn't deal with those who had gone against time. Even if he wanted to interfere, he couldn't. At most, he could introduce a few variables into the matter.
Likewise, saving them would be difficult. Bringing those who had gone against time back? Impossible. They couldn't be taken out—not by him, at least. With half their bodies in the river, they were more or less destined to remain in the Main River of Time forever.
Besides, even if he could bring them back, he wouldn't. Those who had gone against time came from different civilizations, and civilizations didn't interact with one another. Bringing them back would introduce far too many variables. The ones he brought back might even be enemies of Human Civilization.
Any life-form capable of going against time was extreme by nature. Such beings couldn't be brought back.
And there were only so many life-forms capable of locating Ancient Reversal points. If someone brought back those who had gone against time once or twice, The Unknown would easily figure out who was responsible.
The Unknown existed to eradicate those who had gone against time. It would even slaughter members of the Main Sequence to show the Main Dao its resolve and strength. If Lu Yin undermined that purpose himself, it would be a huge joke. The Unknown would do everything it could to eliminate him. He might as well