1. Stay calm: First of all, you need to accept this fact, although it may be difficult. Remember, rejection does not mean that your research is worthless or your ability is problematic. This only means that your paper may not be suitable for current journals or reviewers.
2. Get feedback: Try to contact journal editors and get their feedback. They may give some suggestions on how to improve your paper. These feedbacks are very valuable and can help you do better in the next submission.
3. Revise and resubmit: According to the feedback received, revise your paper, and then select a new journal to resubmit. Remember, don't give up for one failure. Scientific research often needs many attempts to succeed.
4. Expand the scope of submission: If your paper is rejected in a specific journal, it may also be rejected in other journals. Therefore, you may need to expand the scope of your contribution and look for more possibilities.
5. Seek help from peers: If you are not sure how to improve your thesis, you can seek help from peers or tutors. They may offer some valuable suggestions.
6. Learn and grow: Finally, you need to learn and grow from this experience. Reflect on your research methods, writing skills and submission strategies. This will help you avoid making the same mistake in future scientific research.