June. According to the inquiry, official website, a school official in ludong university, indicated that he would complete the graduation formalities and leave school before June. Senior students usually return to school in May next semester, so after the internship, they need to return to school in May to complete the relevant procedures before leaving school. Before graduation, college students need to go back to school for graduation thesis defense, internship assessment, graduation evaluation, graduation procedures and other related work, and also need to handle some related procedures such as the transfer of graduates' files and the transfer of organizational relations in party member. So generally speaking, they need to go back to school in May of next semester to go through the relevant formalities of graduation ceremony.