Aerial photo taken on Feb. 14, 2018 shows Bai Yuhua patroling along the forest of Dahinggan Mountains in Arxan City, north China's Inner Mongolia Autonomous Region , Feb. 14, 2018. Bai Yuhua, a forest ranger of Dahinggan Mountains for 28 years, stuck to his post by himeself on the eve of Chinese Lunar New Year for a consecutive 18th year. (Xinhua/Liu Lei)?