Just want to talk about the different perspective of the vision of life. they are the old man, they have been live longer than us. They still feel healthy and happy in their life. They never complain about their life. even though its hard for them, just let it flow, no matter how hard life it is, they can pass it. They always see the positive thing about life and so we can see how they want to tell us the key of the long live was happy and be grateful.