After having written the letter, Liu Shisui didn't fold it, nor did he put it in an envelope; he
tossed it out of the window.
The letter rose up along with the wind, as if it had two wings attached to it. It headed
toward the southwest at a high speed. Since an amulet of the One-Cottage House was
attached to the letter, it would self-destruct instantly when someone intercepted it, and
the amulet would attack that very interceptor. Only the person who possessed the
energy for this letter could read it.
It was easy for Liu Shisui to find Jing Jiu's energy; for instance, he could find it on the
Lone Sword and on the jasmine flower.
A few days later, the letter arrived outside Green Mountain, but it couldn't pass through
the Great Formation of Green Mountain.
Walking out of his manor cave, Yuan Qijing looked at the sky blankly, and he noticed
the letter in the air.