Before opening up in 70s, China had acquired the ability to build by itself: huge numbers of machine guns and grenades, tanks, fighter planes, rockets and satel

Before opening up in 70s, China had acquired the ability to build by itself: huge numbers of machine guns and grenades, tanks, fighter planes, rockets and satellites (aka missiles), nukes. These minus nukes and missiles plus battleships is pre-WWII Japan. This may be helpful if you're curious why so many countries that choose free market instead of Communism after WWII are still not industrialized today.