The four items were the most basic mending materials used in the corpse-sewing secrets.
Each of these four materials cost one qian of yin virtue.
But Chen Miao only needed to redeem two of them. He still had the rest of the day to find the other two, and if he failed, it would not be too late to redeem them then.
The two he needed to redeem were [human-skin paper] and [Mulberry-Bark Thread].
[Human-skin paper] referred to the skin from the back of an unclaimed corpse. Even if Chen Miao wanted to find some, he had nowhere to look.
[Mulberry-Bark Thread] was thread made from the tender branches of mulberry trees three to five years old.
Making it involved stripping the bark, removing the gum, separating the fibers, drying them, and twisting them into thread.
Chen Miao had also looked it up. Mulberry-bark thread existed in the real world, but it had only been used in ancient times when no alternatives were available.
In modern times, very few people still knew how to make it, much less produce it within a single day.
So although the Southern School Corpse-Sewing Secrets included instructions for making Mulberry-Bark Thread, Chen Miao could not make it now. He could only buy it.
Later, he could see whether he could find someone to make it to order.
[Fishbone Needle], as the name suggested, was a needle ground from fish bones. Suitable materials included shark ribs, whale baleen, sturgeon bones, and carp vertebrae. Whale ribs were best, while carp vertebrae were the poorest choice.
After obtaining the bones, they had to be boiled, then soaked in wood ash to remove the fishy smell. After drying in the shade away from sunlight for seven days, they could be ground and drilled. Chen Miao could obtain the