Niu Er quickly appraised the piece of silk. It had been dyed with a special medicinal solution, using an exceedingly ingenious and secretive method.
If his judgment was correct, words had once been written on this silk, but after being treated with a special medicinal solution, they could no longer be seen.
To reveal them, it would need to undergo special treatment.
Niu Er knew this secret art, called the Three Flowers Two Grasses Secret Record Technique. It was not just Niu Er—virtually every top-tier spy in Great Zhou knew of the Three Flowers Two Grasses Secret Record Technique.
Knowing of it was one thing, but it was useless.
The reason the Three Flowers Two Grasses Secret Record Technique had continued to circulate within the Heavenly Patrol Division, and was even still in use, was precisely because it was incredibly secretive.
Knowing the formula was useless. One had to know the order in which the three flowers and two grasses had been used when this silk was made.
It had to be treated once more in that exact original order before the writing on it would appear.
Get even one step wrong, and the writing on it would vanish completely.
Thus, the Three Flowers Two Grasses Secret Record Technique was extraordinarily secure. Even if it fell into enemy hands, they would have no way of learning its contents.
This made Ye Zhen even more certain that this silk was intelligence delivered by Yu Chaoen.
Yet there was no way to know what that intelligence contained.
"Go, bring the vegetable basket." After pondering quietly for a moment, Ye Zhen suddenly figured it out.
If this had truly been sent by Yu Chaoen, there had to be other clues allowing him to reveal the writing on the silk. Otherwise, would it not