Li's mother and aunt cook for the students, and her father takes care of the daily lives of more than 100 children who live at the school.

Li used her life savings and borrowed 80,000 yuan ($12,600) to build the school.

"All we had were textbooks," the 30-year-old says.

"But they were far from enough. The students needed more books to learn about the outside world."

When she visited her aunt in Henan's capital Zhengzhou in 2009, a neighbor gave the school dozens of children's books. About half were new, and the others had only been read once.

"I was amazed by the number of books," Li says.

"Then I thought: All of these are just from one kid. What if I visit some other families and collect their unwanted books?"

The following morning, she set out with a tricycle and a cardboard sign on which she wrote: "Collecting secondhand books for students for a high price."

Usually, used books sell for 1 yuan a kg. But Li offered 2 yuan.

"I was too shy to shout like other peddlers at first," she recalls, smiling.

"I wasn't sure what people would think of me."

But she felt confident after her first deal, which she made with a 70-year-old woman.

"Within half an hour, she had given me all her granddaughter's books," Li recalls.

"I didn't feel self-conscious after that. I just concentrated on collecting more books for my students."

She had no idea a photograph of her collecting books had gone online a few days after she started. A pedestrian snapped the photo and posted it on Tianya.com's forum. It later appeared in a local newspaper.

"Hundreds of thousands of people commented on the post," recalls newspaper photographer Chang Liang, who later followed Li home and shot a photo series about her life.

"I was waiting for Li in the rain the first time I visited her in Zhengzhou. Li was riding her tricycle and was soaked. She'd used her raincoat to keep the books dry."

Chang followed Li when she brought hundreds of used books to her school a week later.

"The school was shocking," Chang recalls.

"The building was dilapidated and the desks had holes. But when the kids saw Li return with the books, they rushed to her, grabbed the books and sat on the ground to read."

Li decided to build a library for the kids and completed it three years later. She was able to fulfill the goal after the publication of her photo in the newspaper brought donations of hundreds of new and used books from around the country.

Li has remained in the media spotlight. She appeared as a representative of the country's rural teachers in a video promoting China overseas that was shown in New York's Times Square.

But now, her school is facing a new problem - teachers.

"Most of our teachers are older than 40," she says.

"Younger teachers aren't likely to stay in the village because development opportunities are limited. But we need young teachers to bring contemporary instruction to the children."

Li smiles when she talks about remaining single.

"We now have more than 500 students in the school, and more than 70 percent of these kids' parents are migrant workers," she says.

"My life is connected with them every day. I'm happy to be a mother to all of them."