Dual residency registration.
Originally, Ling Wuyuan had never considered that thing important.
But now, as his old home from his previous life—[True Abundant Spirit Realm]—grew ever more mysterious and unfathomable, while the main spacetime here likewise became increasingly vast and complex in his eyes, he finally realized that his dual residency registration actually represented a certain advantage.
The advantage of being able to travel freely between two places.
Of course.
As everyone knew.
Dual residency registration often meant that neither side found it easy to truly regard you as one of their own.
To put it bluntly.
A fence-sitter naturally found it difficult to gain genuine acceptance.
More often than not.
You would even be suspected of being a spy and targeted by both sides.
However.
Ling Wuyuan did not particularly care about those drawbacks.
His position had always centered on himself.
Whether outsiders acknowledged him or not simply did not matter. At most, he merely needed to take care not to be dealt with as a spy...
Given his circumstances, he knew perfectly well that both [True Abundant Spirit Realm] and [Illusory Color Extreme Profound Heaven] had reason to regard him as the other side's spy.
"So, how exactly did the various facilities and equipment inside that ancient mobile ruin detect my residency registration in [True Abundant Spirit Realm] back then..."
"Soul wavelength?"
"The substances that make up my body?"
"Or some special imprint that exists on the basis of spacetime?"
Ling Wuyuan felt that, to keep others from seeing through his origins at a glance in the future, he might need to pay attention to relevant methods.
Only after thinking for several full minutes did Ling Wuyuan's attention return to Bai Jingshu, who was closely scrutinizing him, trying to figure out with her naked eyes exactly what he