In half an hour, Cheng Xianguo had explained the battle's course accurately, including specifying each step and the correspondent time interval. The crowd was speechless, especially Zhuang Hong who had put that method in practice when they heard about Chu Han's mastery over the attacks' timing. Everyone knew how to detonate an explosion, but the hardest part was to choose the correct timing, which could deal the heaviest damage on the zombies.