1. Clear expression: The subject should clearly express the main contents of the email, such as "Postgraduate Entrance Examination Consultation" and "Postgraduate Review Help".
2. Highlight the key points: the subject should highlight the key contents of the email, such as "discussion on the review plan for postgraduate entrance examination" and "sharing the experience of postgraduate entrance examination".
3. Concise and clear: The theme should be concise and clear, and avoid using long or complicated words, so that the recipient can see it at a glance.
4. Politeness: The topic should be polite, and avoid using too direct or indifferent language, such as "postgraduate questions" and "postgraduate consultation".
5. Sincere help: If you ask a teacher or tutor for help, you can express sincere help in the theme, such as "asking questions related to the postgraduate entrance examination" and "I hope the teacher will give you guidance".
In short, the subject of the postgraduate entrance examination email should be concise, focused, polite and sincere for help, so that the recipient can see the main content of the email at a glance.