Sisters,
It seems these are the links for the Bolivia documentary. It's definitely child labor in the midst of extreme poverty.
Somewhere in the middle of Part 1, his facial expression changes and he isn't looking as "cheerful" as he normally does... he wears a sad and/or worried look in his eyes, kind of appealing for mercy or something... but toward the last segments, he smiles brightly while interviewing the salt packers, he just can't help being his natural positive person.
Am not familiar with the singer... is it Ji-sung who visited Oksunbong?
Re' the salt mines... I read somewhere this kind of salt is really not that healthy... that sea salt (esp rock salt) is much better. I've seen some of these big mounds of salt in the Northwest Frontier Province of Pakistan way back 1999
Ah what can I say? It's so sad... but somehow it can't be help...
Taecyeon should write a book about his experience and his reflections... it'll be inspirational I suppose, coming from a celeb like him
1/2:
t.co/SoCekMo1ov
2/2:
t.co/946bJguUwH 
