Electricians patrol power lines in forest near Beiji Village of Mohe City, northeast China's Heilongjiang Province, Jan. 12, 2021. Mohe, the northernmost city of China, has an annual ice and snow period of up to eight months. People of different professions stick to their posts here despite harsh winter weather.Photo:Xinhua

Aerial photo taken on Jan. 13, 2021 shows a fire vehicle patrolling amid a forest farm at Beiji Village of Mohe City, northeast China's Heilongjiang Province. Mohe, the northernmost city of China, has an annual ice and snow period of up to eight months. People of different professions stick to their posts here despite harsh winter weather.Photo:Xinhua

Fire fighters take part in an outdoor training at Beiji Village of Mohe City, northeast China's Heilongjiang Province, Jan. 13, 2021. Mohe, the northernmost city of China, has an annual ice and snow period of up to eight months. People of different professions stick to their posts here despite harsh winter weather.Photo:Xinhua

A border policeman visits a household at Luoguhe Village of Mohe City, northeast China's Heilongjiang Province, Jan. 9, 2021. Mohe, the northernmost city of China, has an annual ice and snow period of up to eight months. People of different professions stick to their posts here despite harsh winter weather.Photo:Xinhua

Aerial photo taken on Jan. 12, 2021 shows electricians patrolling power lines in forest near Beiji Village of Mohe City, northeast China's Heilongjiang Province. Mohe, the northernmost city of China, has an annual ice and snow period of up to eight months. People of different professions stick to their posts here despite harsh winter weather.Photo:Xinhua