Can't you give a degree certificate to the English major of Jiangnan University?
Generally speaking, according to the regulations of the school, most schools link TEM-4 with the degree certificate, and TEM-8 is not limited. However, some schools do not require it, depending on your school's regulations. If you fail CET-4, it is probably a problem, but if you fail CET-4 but pass CET-8, you can also get a degree certificate. You can get your diploma.