Zhou Honghai was discreetly investigating during this period.
Who exactly was the person who could throw flying daggers, with each one hitting the target?
According to the clues given by Qin Kun, firstly, this person could possibly be someone near Song Cheng, and secondly, they could be someone from the martial arts world.
Zhou Honghai first went to investigate those around Song Cheng. Song Cheng had three martial arts experts surrounding him: Wu Yang, Chen Niannian, and Xu Dafa. However, none of them were adept at throwing daggers.
Zhou Honghai specifically tested their martial arts skills. He first blocked Wu Yang in Fireworks Alley and after a few bouts, pretended to escape. Wu Yang chased after him all the way. If Wu Yang knew how to use throwing daggers, he could have acted early, but Wu Yang did nothing but chase.
He tested Chen Niannian as well. Although Chen Niannian could throw daggers, his skill was far from exquisite. He missed the target multiple times.