Zheng Guohua is a 17-year-old middle-distance runner from Tumed Left Banner in Inner Mongolia Autonomous Region. For the past four years, she has been coached by her father Zheng Long. Father and daughter get up at 4 a.m. every day to train on the road, because he wants her to maintain her physical condition during the bitter winter months, Long came up with the ingenious idea of building a "home gym" – from discarded items such as used tires and wire.