Hi Ying, This is not something about your design skills as they are excellent. I would like to see some more process and backbone behind your thinking but all in all you have everything you need right now to take along into a professional career. If I were you I would deepen out the story behind my design work to explain my thinking and future goals, as well as how it can link to business goals, in order to be able to convince employers of not only skills and a positive mindset but also the willingness and ability to commit to a possible long-term relationship with an employer.