In your case, you can apply for a visitor visa and ask your aunt to send you an invitation letter and her American green card. If she is a citizen, she will provide her citizen ID card, her federal tax number and social security number.
If you are in China, you should provide relevant information about your school, family information in China and proof of funds. As a student, you should provide proof of your parents' income.
I had a client whose situation was similar to yours before. She is a senior at Nankai University and graduated in June this year. She actually went to the United States to see a school, but she applied for a tourist visa. Finally passed smoothly.
Good luck. If you have any questions, please feel free to contact me. My QQ number is 8-7-8-2-5-5-8-7-2.