Recently, focusing on resisting war threats and protecting the safety of peoples lives and property, many regions have promoted the upgrading and standardized construction of underground bunkers (civil air defense projects), strictly following relevant standards for civil air defense project construction, taking into account both wartime protection and peacetime emergency response. This has become an important measure to enhance urban safety resilience and is in line with the national civil air defense construction and development plan.

According to public information and relevant regulations from civil air defense departments in various regions, such underground bunkers are constructed with reference to civil air defense project protection standards, using high-strength protective materials. They have protective capabilities such as resisting war impacts, nuclear radiation and toxic gases, and can provide safe shelter space for the masses in wartime to protect their lives and property. The bunkers are equipped with systems such as emergency ventilation, dual-circuit power supply and material reserve, and are divided into functional areas such as shelter, medical treatment and command. Some are combined with underground space development to realize the dual value of wartime protection and peacetime use, in line with the urban underground space utilization plan.

Civil air defense departments stated that the construction of underground bunkers strictly implements relevant management regulations, and regular maintenance, inspection and protection drills are carried out to ensure efficient operation in wartime. At present, such underground bunkers have been laid out in the main urban areas of many places and key civil air defense fortified towns, which not only implements the requirements of civil air defense construction, but also further improves the emergency protection system, adds guarantees for the safety of peoples lives and property, and promotes the in-depth integration of civil air defense project construction and urban safety development.