: >> (sadyrzhan): >> narrator: sadyrzhan wants to call a contact inside china who knows his wife.he chinese authoritiesca monitor s made from foreign numbers, so he needs to use a phone with a chinese sim card. >> (sadyrzhan): (music playing on phone speaker) >> (man on phone and sadyrzhan): >> (sadyrzhan): >> tarrator: he gets through his contact. >> (sadyrzn): >> narrator: chinese technology is advanced enough to be alerten by cerords, so they speak in code. >> (sadyrzhan): >>man on phone): >> (sadyrzhan): (dial tone humming) >> narrator: "studying" means she is being detained. >> (sadyrzhan): a vocal advocate fhurn's become rights. (horse neighing) >> (sadyrzhan) (people cheering and whistling) >> narrator: xinjiang is thein region of a just beyond this border. it means "new territory." >> (speaking local language) >> narrar: uyghur muslims-- with their own culture and language-- have been living there for over 1,000 years.te but thrritory was invaded by china's qing dynastyund 250 years ago and brought under chinese control. ♪ the regime tightly guards access to xinjiang, and

. >> (muyeser): >> (sadyrzhan): >> narrar: this is sadyrzhan.wo years ago, his w muyeser, went to visit her parentin china. she never returned. >> (sadyrzhan): >> narrator: she lefbehind three children. >> (muyeser): >> narrator: soon after she disappred, muyeser managed to smuggle out a short video from what looks like a detention camp. ♪ estimated two million chinese muslims have been held in camps like this, which the chinesees government hasibed as "vocational education and training centers." muyeser's message ends with afa well to her family. >> (muyeser): ♪ >> narrator: march 201 sadyrzhan is on his way from his homen kazakhstan to the chinese border. he's a uyghur, a largely muslim ethnic minority in china, that has been targeted by the communist regime. he's now looking for information about his wife and when she might be released. filming is discouraged on the rder, so we're shooting discreetly on a phon >> (sadyrzhan): >> (man): >> (sadyrzhan): >> narrator: sadyrzhan wants to call a contact inside china whoi knows hi. but the chinese a