Conference IntroductionGENERAL INTRODUCTION
On December 18, 2018, the launch conference of 51WORLD EC2 Earth Clone Plan was held in Beijing. At the conference, 51WORLD (formerly 51VR) released a total of three new products, including 51Sim-One (a driverless simulation platform), 51 City One (a smart city product), and 51 Cloud (a real-time rendering cloud platform for 5G). Urban and 5G applications have entered the stage of full implementation. In the process of creating a real, complete and permanent digital twin world (51WORLD), 51WORLD has also moved from the original static world into a dynamic world and further into a "semi-simulated world".