Between August and September 2007 Chinese hackers were suspected of using Trojan horse spyware on various government computers, including those of the Chancellory, the Ministry of Economics and Technology, and the Ministry of Education and Research.[180] Germans officials believe Trojan viruses were inserted in Microsoft Word and PowerPoint files, and approximately 160 gigabytes of data were siphoned to Canton, Lanzhou and Beijing via South Korea, on instructions from the People’s Liberation Army.[181]