As mayor of Taipei, Chen Shui-bian moved forcefully to shut down video arcades and the eight big "businesses of the night" (i.e. gambling, night clubs, prostitution, barber shops, and so forth). His tough stand is a matter of public record, and this naturally translated into DPP votes at election time.
陳水扁在台北市長任內大刀闊斧掃除電玩及八大行業，提昇治安的成績有目共睹，打治安牌果然贏得選民的信任。