“从防火抓起，堵住毁林之源！”在美丽的首都北京西部３０公里处，有一个远郊区叫门头沟区。那里有北京最高的山，有北京地区最多的贫困乡镇。全区面积为１４５５平方公里，山地占９８．５％，７０％的面积坡度超过了２５度，６２％的土层厚度在３０公分以下，５０％以上的山 “Start from the fire, blocking the source of deforestation!” In the beautiful capital of Beijing 30 kilometers west, there is an outlying area called Mentougou District. There is the highest mountain in Beijing, with the largest number of poor townships in Beijing. The area of ​​1455 square kilometers, 98.5% of the mountains, 70% of the area slope more than 25 degrees, 62% of the soil thickness below 30 cm, 50% of the mountains