What do you mean by body double?

If you are surrounded by unmarried elderly people, this may be the case. This kind of life can't find anyone, as if getting married means losing your life. . . . It is said that such children will not live long, and the first half of their lives will be full of disasters, so they must find a pair of bodies! ! I'm here to save his life. . . Then, you can live a quiet life on earth.