North of the city three protection system protection acres green shade
in recent years, the north of the city to take the forest resources management and protection and three prevention system, no forest fires in the area.
it is reported that the "three" system refers to the establishment of fire emergency teams, to carry out forestry afforestation, forestry administrative law enforcement supervision, forest disease and pest control of multiple means to curb the occurrence of deforestation and forest deforestation, regulate timber circulation channels, mouse density control of forest. Through these means, the per capita public green space in the north of the city by the end of 2005, 4.4 square meters, up to 2011 of 7.63 square meters, and built a garden style units of the green, the standard unit of 39 green. (author: Yang Jianwu Hai Ying)