This situation depends on the individual's quest, some people feel a sense of relief when they retire.
They spent the first half of their lives working and raising their children, and didn't have much time to devote to themselves. After retirement they finally get to have time for themselves, and that's when they spend their retirement time on themselves, such as traveling and learning things they once gave up because they didn't have the time. There are also some elderly people who will have an inexplicable feeling of emptiness after retirement because they let go of all the work they have done for decades overnight, and they themselves will feel bored and empty, and this is when they may need children to motivate them and make them lively, which will also help to prevent them from developing Alzheimer's disease.
Most retired seniors are like the ones we see in the park who will play tai chi in the morning, follow a group of old men playing chess and cards in the afternoon, and square dance in the evening. This can not be completely detached from society, but also can exercise their own body, which is actually a good home for the retired people. They can bring their grandchildren with them in their spare time not only to deepen their relationship with their grandchildren but also to save a lot of time for their own children.
Overall the retired elderly with grandchildren more happiness or more pain on this issue or to see the needs of the elderly themselves. Just as some families do not have grandchildren will urge their children to hurry up to have a grandchild to bring their own, they may be born love children, feel that can bring grandchildren is a very happy thing. There will also be some old people who, like those in Europe and the United States, feel that their time after retirement belongs to them, and they won't ask their children to support them, and he'll use his time after retirement to do something that he finds meaningful.