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Bai Yuhua lights up the candel to prepare dinner in Dahinggan Mountains forest in Arxan City, north China's Inner Mongolia Autonomous Region , Feb. 15, 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)