Generally, on the memorial day, I go to the grave on Qingming every year. The second anniversary sacrifice is very important. In China's traditional concept, ancestor worship is closely related to filial piety. If you don't participate in ancestor worship, you are unfilial and forget your ancestors.
In fact, there are graves on the second anniversary, but people pay attention to auspiciousness, and they are all singular, such as the first anniversary, the third anniversary and so on. On the first anniversary, relatives and friends of the deceased arrive and burn paper in the cemetery to pay homage, which is called "anniversary" or "anniversary burning". The second anniversary is called "Daxiang", and we will also go to the cemetery to offer sacrifices.
After the third anniversary, they burned paper and put on their ordinary clothes. When the relatives and friends of the deceased arrived, they all brought offerings and paper, commonly known as "Yi San". I will also go to the cemetery to sacrifice. After the third anniversary, the children of the deceased can take off their mourning clothes and always dress normally. So the third anniversary is also called "undressing" or "removing filial piety". According to tradition, the funeral etiquette has officially ended.