Passengers were not able to collect pre-paid tickets from machines across the country.
Stolen credit cards and other illegal material are also on sale, a File on 4 investigation discovers.
A decade from now, memory-boosting implants could be available commercially, but at what risk?
Ren Zhengfei says the firm will survive despite security concerns and his daughter's legal troubles.
A cross-party group of MPs says Facebook used its Onavo app to gather information on competitors.