Duplication is inspired by the search for her daughter in the virtual world of the computer used by her daughter Margot before she disappeared in "Cyberstalker", in which the technical engineer David King starts a search for her daughter in the virtual world. These cyber data traces are like another dimension of her daughter's existence. In the future, with the development of technology, each of us may have our copy, the source of this copy, and your thoughts over a period intertwined with the "entity", and then through the analysis of big data and machine learning become. ta seem to be virtual, but at the same time, you know yourself and will monitor the owner's mood based on data Blood pressure bioelectricity, and other information at any time to remind the owner what to do and what not to do. To a certain extent, your machine's manifested mind, your copy, is controlling your true self, so we set up an identical Margot to prompt us to be aware of our lightning-like thoughts, as well as the multiple identities of ourselves in the era of human-machine coexistence.