BEIJING, June 28 (Xinhua) -- None of the over 500 students at a rural boarding school in Wantang, a remote place nestled in the mountainous region of southwest China's Yunnan Province, wear glasses.
Over the years, the school located in the Honghe Hani and Yi Autonomous Prefecture has achieved a remarkable feat of maintaining a zero rate of nearsightedness among its students, sparking curiosity in a country wher
