The precision ball bearings thing reminded me of a news item from a few years ago:
https://www.washingtonpost.com/news/worldviews/wp/2017/01/18...The relevant part of the article:
> To anyone outside of the ballpoint pen manufacturing world, it might seem hard to understand what, exactly, is so surprising about this development. China already produces 38 billion ballpoint pens a year, according to China Daily, which is about 80 percent of all ballpoint pens in the world. That's a lot of pens, but there was a catch: China had long been unable to produce a high-quality version of the most important part of the pen, its tip.
> The tip of a ballpoint pen is what makes it a ballpoint pen. At the tip, a freely rotating ball is held in a small socket which connects it to an ink reservoir that allows the pen to write or draw lines. Manufacturing a ballpoint pen tip that can write comfortably for a long period of time requires high-precision machinery and precisely thin steel, but for years China was unable to match those crafted by foreign companies.