Of course the Chinese song is Little Apple, I should have known. The most ubiquitous Chinese song ever, soon 10 years running. So ubiquitous, it has an English wikipedia article: https://en.wikipedia.org/wiki/Little_Apple_(song)
Knowing that's the song, I am no longer surprised it made it to North Korea.
Knowing that's the song, I am no longer surprised it made it to North Korea.