He didn't take Ning Cheng seriously because he knew how powerful Yi Zhuzhu was. Yi Zhuzhu is at the first level of the Tribulation Realm, but even a monk in the late stage of the Tribulation Realm has no chance against Yi Zhuzhu. What's more, in Wugen Black City, Yi Zhuzhu is the city lord. As long as he says hello, countless military monks and strong men will come over....