Thanks to Jason for sharing this video clip
This video was taken during Chinese “Qing Ming” festival at the cemetery. Qingming Festival is an opportunity for celebrants to remember and honour their ancestors at grave sites. Young and old pray before the ancestors, sweep the tombs and offer food, tea, wine, chopsticks, joss paper accessories, and/or libations to the ancestors. Some people carry willow branches with them on Qingming, or put willow branches on their gates and/or front doors. They believe that willow branches help ward off the evil spirit that wanders on Qingming. Many people have reported seeing ghosts during this festival.