New realities 'rebuild' Beijing's lost city gates

Some of the capital's long-gone landmarks are being recreated in the virtual world. Yuan Quan reports for Xinhua China Features.

Advanced technologies are bringing China's past to life - and it all started with a little girl's question for her father.

People in Beijing can now see how the city's long-demolished gates appeared almost 70 years ago by using their smartphones to overlay historical scenes on photos of the actual sites in the modern metropolis.