I visited the grave two days before Qingming Festival and gave gold bars and pure gold treasures. As soon as I left, a bird landed on the grave and stayed for a long time. What does it mean?

When you visit the grave, you must have brought delicious food, such as fried vegetables, candies, etc. No matter what kind of animal they are, they are very smart. As long as they see or smell it, they will rush to eat, let alone birds. No matter who brings these things to the grave, they are all fake and not real. When birds see those shiny golden things, they know that there are good things and come to look for food.