On this holiday some Chinese also visit the graves of their ancestors to pay their respects. In Hong Kong and Macao, whole extended families head to ancestral graves to clean them and repaint inscriptions, and to lay out food offerings such as roast suckling pig and fruit, which are then eaten (after the spirits have consumed the spiritual element of the food). Chongyang Cake is also popular. Incense sticks are burned. Cemeteries get crowded, and each year grass fires are inadvertently started by the burning incense sticks.