Google knows a lot about you: what you look like, how you sound, your favourite place to get coffee. But all that information stays within Google, it isn't handed over to the UK government, who can then use it to decide if you deserve a mortgage or can go on holiday. 

In China, things work a little differently. The country is gearing up to launch a social credit system in 2020, giving all citizens an identity number that will be linked to a permanent record.

Like a financial score, everything from paying back loans to behaviour on public transport will be included. 

Different cities and provinces have different versions of this at the moment, that will all come together in one big database, in order to keep track of everything everyone is doing.