Revitalizing Human-Robot Interaction: Phygital Twin Driven Robot Avatar for China–Sweden Teleoperation

<正>1 Introduction Digital Twin(DT) is built and maintained in the digital rather physical realm [1, 2]. Dynamic DT mirrors the exact state of the physical system by means of multidimensional models describing the behavior of physical entity, and sensors providing the real-time coupling to models [3]. The outbreak of COVID-19 pandemic results in speeding up the virtualization and digitization of the physical entity with the support from DT. Nevertheless,quarantine and division led by COVID-19 pandemic make human beings' eyes for the physical interaction become more eager. The physical world and the digital world are becoming interwoven, which indicates a new opportunity towards phygital twin. As is so often the question: how can I get closer to my distant companion?How can I extend my service or emotional concern to facilitate interaction in spite of space obstruction? These questions deserve thinking as a lesson learned from outbreak of COVID-19 pandemic.