This picture taken on September 9 shows that Du Yibiao, a forest ranger in Xishan Forest Farm of Xiyao Town, Linwu County, surveys the fire safety in Sanfengling.

Du Yibiao has been working at Sanfengling Lookout Platform at an altitude of 1,580 meters for 25 years. He has kept more than 4,000 diaries, detected and handled more than 100 fire warnings in the county and its neighbors, with "zero" fire in the forest farm for more than 20 years. He is referred to as the guardian of the mountain by the local people. In August this year, he was selected as a candidate of Chinese Moral Models.