What topics should I find when chatting with the older generation?

I can see your filial piety, but it is not a simple matter to associate with the elderly, because the generation gap is there. It is suggested that we should gradually find out the interests and hobbies of this old man, and the next step will be easy. But I don't know whether your relationship with this old man is strange or familiar. Anyway, we usually start with a well-known topic that is not easy to refuse, such as what's the weather like today? How are you? What's for breakfast, lunch and dinner? What about the rest of the family? Do you watch TV? This kind of question is usually answered by the elderly. Then, after talking more, you can explore other topics, especially to find the topic that the other person talks more, and then the conversation gate will slowly open.