1. the forest fire lines: open in coniferous and mixed conifer. A width of 20 to 30 m, not less than 1.5 times the height of trees suitable. Fire line spacing is 5 to 8 km, can be combined with the natural forest terrain, roads and other forest into 3333 ~ 6667 hectares box.
2. forest edge line of fire: the creation of the forest and hills, grassland and farmland adjoining areas. A width of 30 to 50 m.
3. the railway line of fire: the creation of the national railway in the forest and forest on both sides of the iron. A width of 30 to 50 m.
4. highway fire lines: open on one side or both sides of the highway. A width of 10 to 30 m.
5. the border line of fire: the creation of the inside border. A width of 50 to 100 m.
6. villages fire lines: open forest areas around the villages, factories, schools, barracks, lumberyard, Lenz field, warehouses, depots and other buildings. A width of 30 to 50 m.
7.other fire lines: Before burn agriculture, pasture burning, burning charcoal and fire burning ash manure, etc., in order to prevent fire and ran to open fire line, its width, China Southern lands are usually less than 6 meters, other areas less than 20 m.