Chang Jiang (simplified Chinese: 长江; traditional Chinese: 長江; pinyin: Cháng Jiāng) is the transcribed brand name of motorcycles that were once manufactured by the China Nanchang Aircraft Manufacturing Company. It takes its name from the Chang Jiang River, also known as the Yangtze or, in English, the Long River.
The company's CJ750 motorcycle is based on the 1956 Soviet IMZ (Irbitski Mototsikletniy Zavod) M-72, which in turn was derived from the 1938 BMW R71. Many are fitted with sidecars.
They were originally produced for the Chinese military and are powered by an air-cooled, four-stroke, flat-twin engine displacing 746 cc. The rear wheel is shaft-driven.