This is a local custom, because the cemetery buried in a certain place looks like a tiger, and the Feng Shui master also said that this divination looks like a tiger, so it is commonly known as the tiger grave, which is the ancestral grave of Ma in Longmen Village, Binyang County, Guangxi. The master said that tigers eat raw, so many years ago, it was a habit to slaughter raw livestock, pigs, sheep or cocks on the spot and let the blood of livestock flow to the tombstone of the tiger grave. Livestock are generally donated voluntarily by families. First, the pig was pulled to a small canal at the foot of the mountain. Then, the young and middle-aged people of the tribe took the rope to pull the pig to the tiger grave on the steep hillside 50 meters away from the mountain and slaughtered it directly. Then, they rolled the pig down from the mountain and cooked it directly by the canal. The number of grave sweepers is divided into several parts, and they eat with their ancestors on the roadside.
Therefore, every place has its own customs, which are also related to its own geomantic omen. Consider it a folk anecdote. It doesn't matter whether they are good or bad, and there is no need to learn and resist.