Decades of change captured in images

Bao Yin stares into his computer screen, carefully adjusting the colors of a photo.

"Many youngsters have absolutely no idea about what to shoot," he says. "You really need to know what it is that you want to capture; there needs to be a focus."

Bao, 59, knows a few things about that, having taken photos that capture the customs and practices of the Inner Mongolia autonomous region for more than 30 years.