PLA Unit 61398
PLA Unit 61398 (also known as APT1, Comment Crew, Comment Panda, GIF89a, or Byzantine Candor; Chinese: 61398部队, Pinyin: 61398 bùduì) is the military unit cover designator (MUCD) of a People's Liberation Army advanced persistent threat unit that has been alleged to be a source of Chinese computer hacking attacks. The unit is stationed in Pudong, Shanghai, and has been cited by US intelligence agencies since 2002.