1986年初夏的一个下午,北京十三陵东南山林区护林员宋石良发现,对面山上一棵大树突然起火,燃烧的树枝掉落在地面的干草上,火势迅速蔓延。顿时,大火熊熊,浓烟弥漫。宋石良跑进值班室抓起电话报警。消防人员和当地驻军火速赶到,很快扑灭山火,保住了连绵几百平方公顷的森林。事后警方调查起火原因。那天虽然天气晴朗,但气温只有20多摄氏度,离柴草200多摄氏 One afternoon in the early summer of 1986, Song Shiliang, a ranger in the southeast forest area of ​​the Ming Tombs in Beijing, found that a big tree suddenly caught fire on the opposite hill and the burning branches fell on hay on the ground and the fire spread rapidly. Suddenly, big fire, filled with smoke. Song Shiliang ran into the duty room to grab the alarm. Firefighters and local garrisons rushed to exterminate the mountains and quickly saved hundreds of hectares of forest. After the police investigate the cause of the fire. Although the weather was clear that day, but the temperature is only 20 degrees Celsius, more than 200 Celsius from firewood