Advice for everyone:
First and foremost, make a good time plan and hand in your homework on time.
Second: if you really encounter an emergency, you can sort out the relevant materials. For example, I had a minor operation for planting teeth two days before ddl. I submitted the medical record (Chinese scanned copy) and the English translation signed by the doctor (the English translation here can be translated by myself to ensure accuracy, and the doctor's signature is more important without looking for an agency with translation qualifications), which proves that the operation really affected me and I could not successfully complete the thesis. Finally, the appeal was passed, and my grades were not affected by the late submission.
Other reasons can refer to the above examples to prepare materials, as long as you pay attention to 1) the reasons you submitted are true and reasonable, which really have a great impact on your body and mind; 2) Prepare the original document and the corresponding translation version; 3) Submit within the specified time.