Grandparents give their children living expenses every month, which is a manifestation of financial support and care. They are willing to provide financial support for their children and help them meet their daily needs. This is a kind of affection and care. Expressing gratitude to grandparents is a kind of respectful and polite expression, which can be expressed orally or in writing. Such gratitude can not only express gratitude to them, but also strengthen family ties and intimate relationships.