Previously, he had complained that the Broken Mountain Gang's communication system was inefficient.
For which, Mi Junping gave him a scornful look.
Unexpectedly, someone really had developed a sound transmission device based on sound transmission talismans and sound transmission jade jue, which sits in between the two.
Moreover, judging by its description, apart from the relatively long transmission time, there is almost no downside!
So much so that he is quite tempted to buy a pair.
A pair, not just one piece!
The fact that everyone is buying in pairs, reveals the importance of this.
This artifact doesn't yield its full effect when used alone.
After all, with the corresponding crane nest, one 'Sound Transmission Paper Crane' per side, the initiative for sound transmission lies solely on one side.
If other people also have a 'Sound Transmission Paper Crane', it can facilitate mutual communication.
"It's somewhat like a dedicated line telephone on Earth in my previous life."