 The first M-72 model was finished in 1941.Originally, factories were to be located in Moscow, Leningrad (now Saint Petersburg), and Kharkov, but due to the approach of Nazi German troops, the Moscow facilities were moved to Irbit, and the Leningrad and Kharkov facilities to Gorkiy (now called Nizhny Novgorod).Plans for the M-72 were later sold to the Nanchang Aircraft Manufacturing Corporation, a Chinese industrial firm, to build the Chang Jiang.