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By 1970, the Eighth Ministry of Machinery (the Ministry of Agricultural Machinery) merged with the First Ministry of Machinery—retaining the name "First Ministry of Machinery"—to oversee the civilian machinery industry. Meanwhile, the Second through Seventh Ministries of Machinery were placed under the leadership of the Military Commission Office Group, responsible for managing the military industrial sector. As a result, the number of major national ministries and commissions related to machinery was reduced to seven. However, in 1975, a new entity—the Eighth Bureau of the Ministry of Machinery—was carved out from the Seventh Ministry of Machinery (the Ministry of Aerospace Industry). This bureau took charge of the production, research, education, and development planning for tactical missiles. By 1979, it was officially upgraded to the Eighth Ministry of Machinery. This marked the second historical instance of an "eight-ministry coexistence," though this time the shift was particularly significant: the Eighth Ministry of Machinery transitioned from overseeing agricultural machinery to focusing exclusively on tactical missile systems—a move that crossed entirely into a different industrial domain.