For 10-year-old student Xie Xiaoyuan, just getting to school is an ordeal. On a recent day, her frostbitten ears are testament to just how difficult the trip is.
"I get up at five o'clock," she says, "then I comb my hair and start walking."
Xie navigates a mountain path in China's remote Shaanxi province in the dark, trudging through snowstorms and mudslides. Then she has to get a bus for about 10 miles. She hasn't time to eat breakfast.
"For lunch, I spend 15 cents on two pieces of bread and a drink," she says.