Basic knowledge of machinery, basic knowledge of CAD, analytical calculation and practical programming ability, comprehensive writing ability, etc. The second interview means that the second interview is divided into two exams. The mechanical re-examination of Huazhong University of Science and Technology refers to the re-examination of postgraduate exams, which does not include all the items, but only a part of them. The subjects of mechanical re-examination include basic knowledge of machinery, basic knowledge of CAD, analytical calculation and practical programming ability, and comprehensive writing ability.