1, Geyuanxuan Powder for Postgraduate Entrance Examination is a mathematics tutoring product for Postgraduate Entrance Examination.

2. Provide a series of math problems, analysis and simulation exams to help students improve their math scores in the postgraduate entrance examination.

3. Postgraduate entrance examination can be used as an auxiliary tool to help improve the math scores of postgraduate entrance examination.

To sum up, it is reliable to fill in the postgraduate entrance examination.