QJ may refer to:
The QJY-88, also known as the Type 88 LMG (Chinese: 88式通用机枪, 1988 shì tōngyòng jīqiāng; English: 1988 model general purpose machine gun), is a 5.8x42mm Chinese light machine gun designed in the late 1980s by China North Industries Corporation, otherwise known as Norinco.
QjackCtl is a Qt-based tool for controlling the JACK Audio Connection Kit. QjackCtl is free software released under the GNU GPL v2+.
The QJZ-89, also known as the Type 89 heavy machine gun is a heavy machine gun designed in the People's Republic of China.
The People's Liberation Army Ground Force (PLAGF) (simplified Chinese: 中国人民解放军陆军; traditional Chinese: 中國人民解放軍陸軍; pinyin: Zhōngguó Rénmín Jiěfàngjūn Lùjūn) is the land-based service branch of the People's Liberation Army and it is the largest and oldest branch of the entire Chinese armed forces.