While ostentatiously these security firms of China would be to guard Chinese projects and Chinese workers, it has great strategic potential too Like Blackwater or Xe, they can be used for espionage to include industrial espionage. Recruit local as peripheral workers and indoctrinate them to the Chinese Govt's way of thinking so that they can influence locals and local politics and ensure pro Chinese Govts. This will allow China greater inroads into areas of the world. They can also be used to sabotage competitors or projects by the local Govt or foreign Govts so as to ensure the local are in awe of Chinese efficiency and so on. Great potential that China is releasing to fulfil her aims!