Once upon a time, there was an old man and an old woman. In the distant past, they lived in the same house with two children. However, when children grow up, they will definitely move from the countryside to the city. Therefore, the elderly husband and wife stayed alone at home. On an ordinary day, children and grandchildren unexpectedly came to their side. At first glance, this seems to be a happy event. Written by Peter Patrick 76（ [email protected] ）