How can senior citizens over 80 years old successfully go to the United States to visit relatives?

Yes, visiting relatives at the age of 89 is really a very low chance of success.

I don’t know if you are ready for the old man’s physical examination.

It means that relatives in the United States cannot return to the country in person, so the elderly need to go in person, otherwise they will suspect that they are going to the United States to spend their old age