Life below zero

Clockwise from left: Zhu Chuanjin, 83, keeps warm in his home in Beijing, which he shares with his family. He has only one electric heater in his living room; Zhao Qing, a 70-year-old beggar from Shandong province, wanders Haidian district; Zhang Kongjun, a bottled water delivery man, rides his tricycle in Nanluoguxiang on Sunday; and a corridor leading to some basement apartments in the capital. Photos by Zhang Yuchen and Hu Yongqi