Photo shows the Pumaqangtang Township's Government of Shannan City, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

In March, Pumaqangtang Township is under azure blue sky. Hordes of flocks and herds are on the pasture. With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows the border officers and soldiers of Pumaqangtang Township are taking a group photo, southwest China's Tibet Autonomous Region, Jan. 19, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows the border officers and soldiers of Pumaqangtang Township are growing vegetables, southwest China's Tibet Autonomous Region, Jan. 18, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows the Pborder officers and soldiers of Pumaqangtang Township are going on patrol, southwest China's Tibet Autonomous Region, Jan. 19, 2017. [Photo/Xinhua]

Photo shows some of the cadres sticking at Pumaqangtang Township of Shannan City, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

Photo shows the children are having class at Pumaqangtang Township Primary School of Shannan City, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

Photo shows the villagers of Pumaqangtang Township, Shannan City are receiving fodder for free, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

Photo shows the scenery of Pumaqangtang Township, Shannan City, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows the secretary of Pumaqangtang Township Party Committee is firing cow dung for warmth at the township office, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows the villager from Pumaqangtang Township of Shannan City, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.

Photo shows local villager of Pumaqangtang Township of Shannan City is driving, southwest China's Tibet Autonomous Region, March 10, 2017. [Photo/Xinhua]

With an area of 1,200 sq.km. and an average elevation of 5,373 mters, Pumaqangtang Township is located at Shannan City, southwest China's Tibet Autonomous Region, which is the highest township in China. Its oxygen content is less than 40 percent of that at the sea level, and its air presssure is only half of that at the plain area. Here, people's average life span is 49.5. Residents must contend with strong winds, biting cold and lower oxygen levels. Most people die before getting old. More than 1,000 cadres and the masses as well as eight border officers and soldiers live here -the "life restricted zone", composing gorgeous chapters with their loyal stick, brave undertakes and their pioneering endeavors.