Earlier on, when Nie Li beat Chu Yuan down onto the floor, everyone felt that Chu Yuan underestimated his opponent too much which led to Nie Li’s sneak attack to succeed. However, in contrary to everyone’s expectations, when he was facing Chu Yuan’s attack, Nie Li used only one move to beat him to the ground again.
If it is the first time, that can be explained with luck. However, it was two successive time, how can this be simply explained as luck?