text:  You don't breathe a word to your friends, family, to your boss, nothing. If you tell anyone you've already been interviewed by Chinese police, your life is in danger. Finally, after seven hours on the phone, Officer Feng lets Helen go. But only after she's downloaded an app so he can listen in to what she's doing 24-7, just in case she tries to tip anybody off. Breaking the confidentiality agreement would add six months to her sentence, she's been warned.