About the Street photography between London and Beijing

That day I got a brief of London street photography through the ages from my tutor.That's a very  interesting topic.As we know,the history of London, its murderers and heroes, its keepers and denizens, can be found in its streets as in no other city in the world. Like the city itself the images on display are full of grief, irony and delight, sometimes touched by madness, sometimes by desire.

http://www.telegraph.co.uk/culture/photography/8318158/London-street-photography-through-the-ages.html

Compare with Beijing street photography's history.20 years before,people in Beijing less communicate with each other.Lots of photography are just about the building and the street. They were busy with make a living.But from this years,everything change,you could not find this beijing anymore now.

More photos about the topic take you back to last century in Beijing
I would like to do more research about this topic.