They rounded up hundreds of Jang family and sent them to the camps, they are rounding up thousands of his associates and likely their extended families too. They will be starved, forced to work and raped and beaten in the camps. Yes, these extended families include children too, they do not distinguish.
It is such horror, it is difficult to believe. Even the Soviets or the WWII Germans (with notable exceptions, to be sure) were not as barbaric.