https://youtube.com/watch?v=NjUn4UkunqULess than 30 years ago, North Koreans were more than twice as wealthy as their comrades in China. Now, they're significantly poorer. Here's how it happened. ---------- Connect with us on... Twitter: https://twitter.com/business Facebook: https://www.facebook.com/bloombergbusiness Instagram: https://www.instagram.com/bloombergbusiness/