China rolls out new data law over 'national security' fears

China's new data security law takes effect from Wednesday -- the latest effort to tighten oversight of the country's mammoth tech sector.The broadly worded law seeks to tighten the leash on China's tech giants and what they do with information from their hundreds of millions of users.It also comes as fears grow over data security with government departments becoming increasingly dependent on cloud storage services.Beijing has also flagged national security concerns as justification for the law. As Chinese tech firms look to branch out overseas, authorities fear domestic data will end up in foreign hands.Here is a look at what we know about the new law:












