But it's not that there is no way. What matters is the way.

Because the old man is stubborn and unconfident, he is afraid that others will say that he can't do it, so no matter how you persuade him now, he will think that he despises him.

Therefore, you should first follow the old man's words, say that he is in good health, praise him for his good health, take him for more walks, play with him more, and chat with him more. Although this process is boring and contrary to your mind, without it, the old people will not trust you.

After the old man trusts you, you can enlighten him, persuade him and reason, because the old man is defenseless against you.

Of course, it's more convenient if there are people trusted by the elderly. Find that person directly, get through his job, and let that person help you with the same effect.

Oh, by the way, one more thing, you must pay attention to, because the old people nowadays can't read, so don't tell them any big words and technical terms, and use more common sayings and disgusting examples, and the effect is still quite good. For example, "now you have a piece of meat in your stomach, and this piece of meat is robbing you of food." The bigger the meat is, the smaller the belly will be. You'd better get this meat down as soon as possible, just like raising pigs. How well we ate. "