In truth, there was no fixed format for submitting a letter to the Yin-Yang Boundary. The term was simply something people repeated by word of mouth; all one had to do was write down the target one wanted assassinated and toss it into the submission site.
Chu Jingtang advised against writing on paper, however. It could easily get damp and such, and who knew what conditions were like inside the Yin-Yang Boundary? He recommended writing on "white brocade."
This "white brocade" was the white cloth they were currently wearing. It was also one of the primary materials used to make Six Realms Exchange notes.
After writing the letter on the white brocade, one wrapped a ten-thousand-liang note inside it, tossed it into the Yin-Yang Boundary, and went home to wait for the assassin to come knocking.
The time limit was said to be one month. If the assassin still had not made contact after a month, it meant he had declined the job.
"A whole month? Isn't that a bit too long to wait?" Wu Jinliang grumbled beside them.
Chu Jingtang sighed. "There's no helping it. If we want him to do something for us, we naturally have to follow his rules."
Shi Chun was more understanding. "Neither the living nor the dead will tolerate him, and everyone wants to capture him. It's understandable that he'd leave himself time to observe things carefully."
Wu Jinliang asked, "You mean we have to sit around for a month before going to get that batch of Death-Defying Incense? Whether it'll even still be there in a month is another question."
"Other people might need a month. Once I submit my letter, I might not." After that boast, Shi Chun asked Chu Jingtang, "Do you know how often Yu Xuanbing visits the Yin-Yang Boundary