When nobody came forward as the body lay prone on the street, Ning Fu and Zhou Sheng got off their own hiding place and went towards the injured man.
When Zhou Sheng pulled off the mask, the other person didn't have any defining features on his face and looked like a very common, everyday person whom no one would have paid attention to in a crowd.
Just as Ning Fu was about to question the injured man, he saw the other person swallow the poison that must have been hidden in one of his molars and froth could be seen gushing out of his mouth.
Ning Fu was so incensed at his failure that he viciously kicked the prone body but his rage simmered down somewhat when Zhou Sheng pulled on his sleeves, "Big Brother, the paper slip."
Ning Fu bent down to pick up the paper slip and when he opened it, the slip only had one line written on it - ' The relation between the new calf and the dragon is strong.'