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How to persuade the elderly not to buy health care products indiscriminately?

To persuade the elderly not to buy health care products indiscriminately, I think the only way is to spend more time with the elderly, get along with them more and talk to them more. This way they won’t buy health care products randomly. You have to know that many old people now buy health care products because they are too lonely and bored, so unscrupulous people take advantage of them. You need to know this.