The Eye of Heavenly Derivation had almost absurd surveillance capabilities. Its only shortcomings were that it could neither see through objects nor transmit sound.
It could not see through roofs to reveal what was happening indoors.
But...
Inside the Strategist Pavilion.
A large crowd had gathered, numbering in the hundreds. All had been temporarily transferred from the Household Pavilion. They watched the individual feeds on the Heaven-Deriving Formation Screen, constantly writing things down.
There were both men and women among them.
But they all shared one skill: lip-reading.
They worked in pairs.
Each pair handled one feed, then compiled, cross-checked, and consolidated the information they transcribed.
The Screen currently showed several separate views of the Qi Night-Opening People Continent.
There was little point in watching the Wasteland Clan's feed.
The Strange Entity Clan discussed everything inside the Palace, while the Strange Tide below never spoke. There was practically nothing to glean. By contrast, although private discussions indoors on the Qi Night-Opening People Continent were also hidden, casual conversations out in the open could still reveal information.
Chen Fan was not in the Strategist Pavilion.
Instead, he laid sections of the City Wall while watching the feeds transmitted by the Eye of Heavenly Derivation on the Endless Night Lord Panel deep within his soul. He could access them without the Heavenly Derivation Display.
Some of the buildings were unfamiliar to him, and they looked anything but ordinary.
Especially...
Chen Fan narrowed his eyes slightly, took the Heaven-Questioning Bell from his robe, and began describing what he saw.
"There's a building that should be a Cannon Tower, mounted on the City Wall. Its barrel is extremely long, roughly a hundred meters."
"There are scarlet Vein Patterns on its surface."
"The Cannon Tower has a large base, engraved with the words 'Heavenly Evolution.'"