Today is Ching Ming, the annual grave sweeping festival in Hong Kong.

It's the day when people in the city visit the tombs of their deceased relatives to worship their ancestors.

They offer food, burn incense and paper offerings, and perform any maintenance necessary on the tombs.

In death, as in life, Hong Kong people are stacked up vertically, one on top of the other.

ALEX HOFFORD : HONG KONG CHINA PHOTOGRAPHER