Zhang Baohua, a teacher for 28 years, prepares before class begins on Wednesday morning, at a primary school in Quanjuyong village of Northeast China’s Liaoning province. Zhang, 49, teaches several classes everyday, including Chinese, mathematics and morals. The school now has only four students left and Zhang, who came to the school 28 years ago, is the only teacher. [Photo/Xinhua]

Zhang Baohua (R), a rural teacher for 28 years, does farm work in the fields with his father, Sept 6, 2011. [Photo/Xinhua]