What was one of the reasons for the rapid restoration of the heavy industry of the USSR after the Great Patriotic War?

What was one of the reasons for the rapid restoration of the heavy industry of the USSR after the Great Patriotic War? What is characteristic of the national policy of the USSR 1945-1953?

The fact that most of the enterprises were transported to the eastern regions of the country before their destruction. And they have already worked successfully for several years. In the liberated territories, the restoration of the former factories took place. At the same time, the personnel that had been evacuated returned only partially. Thus, in fact, two enterprises appeared, or even three instead of one previous one. And trained qualified personnel already knew how to work. And they were enough to replenish the staff.