The word " lifetime " was often used in novels, movies, and television dramas, often as a subject of love. Its origin had many specific adaptation situations that might vary from work to work. In some novels, the phrase " forever " might have originated from the ancient Chinese idiom " forever ", which meant that a person would only love one person in his life and never leave him forever. This kind of plot might be used to portray the deep love between the protagonists or as a eulogy for love. In some modern romance novels," forever " might refer to the love vows between the protagonists. They would promise each other that they would only love one person for the rest of their lives, never leave each other, and be together forever. This kind of plot was usually used to portray the romantic love between the protagonists so that the readers could feel the beauty and firmness of love. The exact adaptation of the word "forever" may vary from work to work.