Weird, I tried to click on "Kimchi Harvest" to see a larger version. Instead, the link was to https://mydiplomaticlife.com/how-to-survive-3-years-in-north..., which just took me to the top of the article.
They also had something called "subotnik", aka voluntary Saturday labor. This was a practice where citizens, including workers and students, participated in unpaid labor on Saturdays. These activities included various tasks like cleaning up the city (that's what I remember doing as a kid). There was nothing "voluntary" about it.
IE, in school we only had a superficial explanation of what communism is; it wasn't until I was in my 30s that I understood the whole "cult of personality" thing.