"Since Brother Wei already knows, then I have spoken out of turn. If the City Enforcement Team leaves, I hope Brother Wei will let me know when the time comes, so that I may return to the Immortal Market."
"He Song."
After channeling spiritual power through his fingers and leaving words upon the paper, He Song exhaled a pulse of spiritual power. The thin sheet in his hand immediately transformed into a Sound Transmission Paper Crane and shot into the sky. It passed through the Mysterious Trace Array and vanished in the blink of an eye.
Sound Transmission Paper Cranes flew extremely fast; Qi Refining stage cultivators could not possibly catch them.
Even Foundation Establishment Real Persons found it difficult to pursue one without having learned a profound Escape Technique.
However, once one reached the Foundation Establishment Realm, the Sound Transmission Technique would be phased out. Sound Transmission Talismans were the mainstream method in the world of cultivation.
The Sound Transmission Technique merely gave Qi Refining stage cultivators who could not afford Sound Transmission Talismans a quick way to contact friends.
No Foundation Establishment Real Person would have nothing better to do than intercept or chase after Sound Transmission Paper Cranes sent between Qi Refining stage cultivators.
Cultivators were all busy. They had no time for such idleness.
Moreover, if such a thing truly happened, the Sound Transmission Paper Crane would instantly self-destruct, leaving no information to be obtained.
That was why He Song released his own aura whenever he received a Sound Transmission Paper Crane.
Only He Song's own aura could disperse the spiritual power within the Sound Transmission Paper Crane and prevent it from self-destructing.
If it were forcibly opened, the Sound Transmission Paper Crane would immediately self-destruct.
After releasing the Sound Transmission Paper Crane, He Song pondered