Three weeks. According to the inquiry of senior three. Com, Langfang Mingyuan School is a full-time, closed private school approved by the Municipal Education Bureau. It was founded in 2009. After entering the school, students are required to stay in uniform and can go home once every three weeks. Langfang Mingyuan School is a sprint training school for college entrance examination. After nine years of development, we have created an excellent teaching and management team and summed up a unique teaching and management model.