Software, it's hard to say, but you can do some health preservation methods online or on TV. I hope your grandfather can be happy. Actually, I think the old people care about you. Spend more time with him, care about him, tell jokes and read newspapers. Your grandfather will get younger and younger. In fact, if you have this heart, he will be satisfied. You are very filial. The important thing is not only health, but also companionship.