There's no such thing as a yes or no, it's not a hard and fast rule.
After all, I watched the news not long ago when a migrant worker gave up his seat to a woman holding a child, only to have the woman call him dirty and dirt. The whole bus was outraged at the time! Giving up your seat to such a person is simply a waste of your energy and trampling on your dignity. So there is no one who stipulates that you must give up your seat to an elderly person on the bus.
After all, there really are some ungrateful people who will blame you instead. So it also depends on the person on the bus, if that person really needs to give up his seat, then give him a seat, after all, with others convenient, their own convenience. But some people are born unruly, you give him a seat, he felt that you take advantage of him, feel that you seem to figure what he, such a person, you simply sit yourself, anyway, you have been on the day shift, very tired, anyway, you brought the child, but also very tired. He doesn't appreciate it anyway, so why don't you just let him stand?
And some older people are actually quite strong, square dancing quite six, once on the bus all kinds of pretending, saying that their back is not good, legs and feet are not good, which are not good. Such people, I also hate. Usually quite a lot of activities, body movements are quite a lot, a bus, has become another look, if not seen him dancing square dance, do not know he is pretending it! You don't have to give up your seat for this kind of person, it's fine for him to stand like this.
There is another kind of woman who is not convinced of her age, the more you give her a seat, the more angry she is, because she thinks she is not that old at all, you give her a seat, but instead of looking at her as old! Originally, women are very jealous of their age, if in her impression, you look at her as if she were an old man, she will be very unhappy, so such a person also do not give her a seat.
Giving up your seat to an elderly person is originally a fine tradition, but now many people have made this tradition tasteless. That's why people will be entangled in the should not give up their seats, sometimes unnecessary to give up their seats should not let it, more to let themselves sit for a while how good.