Are Chinese Folks Having Dementia?

In China, almost it seems like a lot of the actors and actresses still can sing and dance. It's actually fun to watch that there are some recent variety shows where they invite celebrities,. You know, they go on these shows and then they make shows together. Start out with dancing badly and then you become the actual star at the end of the show. Are Chinese folks worried about getting dementia? Is this something that comes up? At least my parents do.