传统意义上的报警方式有两种:一是报警人拨打报警电话,通过叙述向公安机关报告警情。二是在银行、商业网点、要害机关等处设置报警装置及监控摄像头,发生抢劫等紧急情况时,由值班人员按动报警按钮,将报警信号或现场图像送往公安机关。但是,当在街头发生紧急情况需要紧急报警或救助时,人们该如何迅速使警方了解你的危急处境呢? The traditional sense of the alarm in two ways: First, call the alarm call, through the narrative to the police report police intelligence. Second, set up alarm devices and surveillance cameras at banks, commercial outlets, key agencies, etc. When emergency situations such as robberies occur, the alarm personnel press the alarm button to send alarm signals or live images to the public security organ. But how can people promptly get the police aware of your critical situation when an emergency call or rescue is needed in an emergency on the street?