"JIANKANG BAO"(Health Newspaper)According to a recent survey, 34.26 percent of Han students in the 7-22 age group suffer from bad eyesight, and nearly 22 percent more Han students than minority...
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"JIANKANG BAO"(Health Newspaper)According to a recent survey, 34.26 percent of Han students in the 7-22 age group suffer from bad eyesight, and nearly 22 percent more Han students than minority...