The idea was thought up by a paramedic who found that when he went to the scenes of accidents, there were always mobile phones with patients, but they didn't know which number to call.

这个创意是由一位医护人员想出来的。 他发现每当他赶到事故现场时，病人手里都有手机，但是他们不知道要打电话通知谁。