A new documentary has detailed the horrific conditions in which Australian journalist Cheng Lei is held, which included being escorted blindfolded and tied to monthly press briefings lasting 30 minutes. Molly Gambhir tells you all about China's crackdown on foreign media.

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China has formally arrested an Australian journalist for CGTN, on suspicion of illegally supplying state secrets overseas. China's Foreign Ministry confirmed Cheng Lei's arrest and said her legal rights were being "fully guaranteed."

China: Australian journalist arrested for spying

Australian Journalist Cheng Lei has been arrested in China, as he is accused of spying and leaking state secrets overseas. Cheng Lei was working as a business news anchor for China-based CGTN.