The empirical study of Maoming anti-PX protest examines how the public are mobilized to participate in the collective action. The paper finds that the organizers of the protest used the social media to implement the frame bridging, the frame amplification and the frame transformation that ultimately managed to achieve the frame alignment between the organizers and the public. And the corresponding frame resonance results in the consensus mobilization. In contrast, the Maoming Municipal Government failed to form effective frame alignment. The protest organizers and the local government competed for the game of the public opinion, and the essence of the game is the competition of frames.