Star Track.
A special infrastructural facility of Great Xia, not constructed using physical Spiritual Materials, but built with Starlight and some mysterious rule, almost invisible on normal days. Only when activated will the occasional sky gazer see a fleeting starlight.
Very few can use this facility; it can not only link the isolated Ether networks of various cities but also acts as a track, swiftly transferring certain things between cities.
For example...
Ice Silkworm Cloud Pattern Paper.
Nanhai City Celestial Secret Bureau.
The commanding True Man on duty, Deputy Director Zhang Tingqiu, sat in his antiquely furnished office sipping tea, when a subtle gleam suddenly brightened in his eyes.
"The Level B Star Post Document from Zhen Sheng City."
He gestured to capture a fleeting glow fly from outside the window, unfolded the Cloud Pattern Paper, scanned it with Spiritual Power, and solemnly without hesitation stamped the Vermilion Bird Copper Seal, then lightly urged it.
