At the beginning of my preparation for the postgraduate entrance examination, I thought about this problem seriously. First of all, I think it is because of my professional knowledge and my interest.During my undergraduate study, I systematically learned the basic knowledge of mechanical design and manufacturing, but I knew that in order to adapt to the development of society, the postgraduate entrance examination was my only choice. Secondly, the mechanical engineering major of tianjin university of technology has always been my ideal. The professional degree and social recognition of our school's tutor have been tested by practice. Finally, during the postgraduate study, I will work hard to learn professional knowledge and actively combine with social practice.We should put our professional knowledge into practice and reflect our professional value in our practical life.