China is currently having a three-day public holiday and 4th April is the Qingming Festival, or Tomb-Sweeping Festival. Chinese communities across Asia visit the graves of their families to pay respects and this begins with a thorough cleaning, hence the name.
The BBC News website has some images from the ritual.
It is traditional to burn representations of things the deceased may need in the afterlife, such as paper money. Over time these have become much more elaborate and you can buy paper houses, paper furniture and paper phones. In this image, a relative is burning a paper iPad, iPod Nano and iPhone for their relative to use in heaven.