If you see a group of people dancing and singing on the street or in the railway station, you don't need to feel surprised£®They are a flash mob £¨¿ìÉÁ×壩, which is a group of people who come together suddenly in a public place, do something unusual for a brief period of time, and then quickly break up£®They are usually organized with the help of the Internet or other digital communication network£®At a predetermined time, they gather and perform some  distractions£¨ÏûDz£© such as waving their hands and exchanging books, Then, they quickly break up before the police can arrive£®Using mobile phones, the flash mob can change its location if the first one has been replaced for any reason£®

        Bill Lasik, senior editor of Harper’s Magazine, organized the first flash mob in Manhattan in May 2003 and the first successful flash mob came together on June 3, 2003 - after the first attempt was foiled at Macy's department store£®Lasik claimed that the activity was designed to make fun of hipsters £¨Æðʱ÷ÖµÄÈË£©, and call attention to the cultural atmosphere£®