With its progress in technology, China has moved beyond its past internet blockade tactics to actively initiate public opinion warfare on the basis of technological advantages in many areas. It spares no effort in promoting its image in the international community via official and unofficial channels. The most important part of this digital war for public opinion is knowledge about the target subject’s computer usage habits, preferred topics, ideology, and political orientation. Personal data of this kind will become a perfect sample for a country to design computer viruses and tactics to manipulate public opinion.