Old age refers to people's love and respect for the elderly, especially in novels, movies, television dramas and other fictional worlds. The elderly are often seen as a symbol of wisdom and experience, with unique charm and value. This kind of thinking might stem from the innate sympathy and respect humans had for the elderly, or it might be influenced by family, society, and culture as they grew up. The experience and wisdom of the elderly were often seen as a valuable asset that could provide guidance and enlightenment to the young. Older people might also bring in some special plots and characters such as the protagonist's mentor, friends, lovers, etc. These characters could bring more emotion and meaning to the story. People may also be excited by the appearance and atmosphere of the elderly. Older people usually have a more mature, elegant, healthy, and natural appearance, which may attract people's attention and appreciation. The lifestyle and atmosphere of the elderly may also be novel and interesting. For example, the elderly may like to share their interests and experiences with the young. This interaction can bring more plot and interest to the story. The feeling of nostalgia for the elderly was a complex emotion that might originate from people's sympathy, respect, and appreciation for the elderly, or the excitement and curiosity brought about by the special identity and plot of the elderly.