Perhaps because of loneliness, no one shares their joys and sorrows. When you are free, try to accompany the elderly to go out for a walk, take a walk, go shopping, shop and travel. Try not to let the old man stay at home alone. He needs someone to listen to him, discuss things with him more, teach him new things, and teach him to play mobile phones. Tell him what you want to eat, and ask him to find a recipe online to cook for you. Wait, there are many, many more. In a word, it is to let the old people do something and have fun. So he won't dwell on the past.