What was Beijing like 100 years ago?

It was a time when most Chinese didn't have cameras, but luckily there were many foreigners traveling in our old city, and they helped us save the memories in photos.

Five years ago, two Danish young men - Lars Ulrik Thom and Simon Gjeroe - began collecting these photos, making them into postcards and starting their business in Beijing's Nan Luo Gu Xiang in 2009.

As Ulrik Thom put it, what they do is preserving history in a fresh way.

Even if you don't buy anything in their store, you can still hear their stories about each and every one of the photos, about the city of Beijing - its people and all of its changes through time.

Video: Christie Lee

Photograph: Huang Lan