A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police A set of posters directly hit the May Day holiday of the police