1. pillars collapsed: field staff may be bruised beyond the control of the scene, so the place to be outside with the staff on standby to lead people to escape.
2. Natural disasters: earthquakes greater than expected, the first to come to deal with the evacuation of the population-based exhibits. (Use loudspeakers to direct the public or broadcast position)
3. man-made disasters: truck accident in transit, transport personnel can not give return situation. (A few minutes beforehand inform the transport of personnel notified once, in order to grasp the occurrence of the event).
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