Huang is a world where time, space, and every other concept are mixed together.
We cannot change history carelessly. Every opening is a turning point in history. It can withstand minor changes, but once a break appears, history will be lost, like a train coming uncoupled. And a change in history does not necessarily come from someone's birth. It could just as easily be a dog's pee. Its tiny influence might bring a rainstorm, trigger a flash flood, cause people to migrate, or even start a war. If the Singer had been startled, and she hadn't peed there, human civilization would have turned out very differently. Whether Huang could still exist is another question. That's why everyone here knows where most of the turning points are. By calculating everything to the limit, they can minimize losses even when wiping out an entire city.
This is Huang.
The future has already fallen apart.
The past will not linger for long, either.
And the only thing we can use to change everything is the Qi in our hands.