As a public transportation with a large passenger capacity, the safety of the subway will directly affect the lives and property safety of passengers. Safe operation is the primary goal and basic principle of subway transportation. Fire is the main factor threatening subway safety, and an important cause of casualties and property losses.

The comprehensive pipeline corridor (called "common ditch" in Japan and "common pipeline" in Taiwan) is an underground urban pipeline comprehensive corridor, that is, a tunnel space is built underground in the city to connect electricity, communications, gas, heating, water supply and drainage, etc. This kind of engineering pipelines are integrated, with special inspection ports, hoisting ports and monitoring systems. The implementation of unified planning, unified design, unified construction and management is an important infrastructure and "lifeline" to ensure the operation of the city.

A data center is a network of specific equipment that is globally coordinated to transmit, accelerate, display, calculate, and store data and information on the Internet network infrastructure. With the increase in the amount of computers and data, people can also improve their abilities through continuous learning and accumulation, which is an important sign of the information age.

Tobacco warehouses are mainly places or buildings where tobacco companies store and place cigarettes, tobacco leaves and other materials. When a fire occurs in a tobacco warehouse, it not only has the characteristics of ordinary warehouse fire accidents, but also because the materials stored in it have strong flammability and high value. Once a fire accident occurs, it will cause unimaginable consequences in a short period of time, which will cause enterprises Cause huge economic losses.