I am also an old self-taught student in Shanghai. After reading your question, I feel that you are mistaken.
East China University of Science and Technology does not offer a self-taught undergraduate course in business administration, but offers a major in business administration.
The self-taught examination for business administration major is attended by Shanghai University of Engineering Science.
As far as I know, if you are a business administration major, if you are a non-economic management major or above, you must choose to take two additional courses, namely, enterprise organization and environment, business communication and financial management, offered by the Sino-British cooperative business administration major (basic course).
Moreover, East China University of Science and Technology canceled the policy of replacing English 2 with PEST3, and English 2 must be tested, which is very difficult.
The specific examination subjects are shown in the figure.
I hope I can help you. Specifically, you can consult the examiner college self-study office, which is more reliable.