26440 1。 According to official website information of Beijing Jiaotong University, the postcode of Weihai Campus is 26440 1. Located in Beijing, Beijing Jiaotong University is a national key university directly under the Ministry of Education of People's Republic of China (PRC), which is jointly established by the Ministry of Education, the Ministry of Transport, the Beijing Municipal People's Government and China Railway Corporation. It is a national "double-class" construction university and a "21/engineering" construction university.