Legal Analysis: The Emergency Response Law of People's Republic of China (PRC) stipulates that this law is formulated in order to prevent and reduce the occurrence of emergencies, control, mitigate and eliminate the serious social harm caused by emergencies, standardize emergency response activities, protect people's lives and property, and safeguard national security, public security, environmental security and social order. This Law is applicable to emergency prevention and emergency preparedness, monitoring and early warning, emergency response and rescue, and post-disaster recovery and reconstruction. The term "unexpected events" as mentioned in this Law refers to natural disasters, accidents, public health incidents and social security incidents that occur suddenly and cause or may cause serious social harm and require emergency measures. According to the degree of social harm, the scope of influence and other factors, natural disasters, accidents and public health incidents are divided into four levels: particularly significant, significant, large and general. Where laws, administrative regulations or the State Council have other provisions, those provisions shall prevail.

The grading standards for emergencies shall be formulated by the departments determined by the State Council or the State Council.

Legal basis: People's Republic of China (PRC) Emergency Response Law.

Article 1 This Law is formulated in order to prevent and reduce the occurrence of emergencies, control, mitigate and eliminate the serious social harm caused by emergencies, standardize emergency response activities, protect people's lives and property, and safeguard national security, public security, environmental security and social order.

Article 2 This Law shall apply to emergency prevention and emergency preparedness, monitoring and early warning, emergency response and rescue, and post-disaster recovery and reconstruction.

Article 3 The term "unexpected events" as mentioned in this Law refers to natural disasters, accidents, public health incidents and social security incidents that occur suddenly and cause or may cause serious social harm and require emergency measures.

According to the degree of social harm, the scope of influence and other factors, natural disasters, accidents and public health incidents are divided into four levels: particularly significant, significant, large and general. Where laws, administrative regulations or the State Council have other provisions, those provisions shall prevail.

The grading standards for emergencies shall be formulated by the departments determined by the State Council or the State Council.