C152 White Robe
That day in Jinping City, Bi Huan swallowed that red pill and then turned around to leave. With what he said before, he said 'a hundred years, a hundred years, and a hundred years' worth of dried bones'.
That medicinal pill was called the Hundred Years Withering Bone. After consuming it, one could only live for a hundred years. After that, one would die. It could be said to be a type of poison