17: 30 and 18. According to the website information of Qian 'an Education Bureau, the school-leaving time of Qian 'an Vocational School Center is set to be no later than 17: 30 in winter (spring). Summer (autumn) season shall not be later than 18. Qian 'an Vocational Education Center was established in 1983. It is a multi-functional comprehensive national key vocational school and a county-level vocational education center capacity training school integrating secondary vocational education, adult education, mechanic education and various short-term training.