University students prepare semester finals at an air-conditioned cafeteria in Tianjin, north China, July 13, 2015. Monday marked the first day of dog days as the temperature in Tianjin reached 39.1 degrees Celsius. (Xinhua/Yue Yuewei)
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University students prepare semester finals at an air-conditioned cafeteria in Tianjin, north China, July 13, 2015. Monday marked the first day of dog days as the temperature in Tianjin reached 39.1 degrees Celsius. (Xinhua/Yue Yuewei)
