1, direct online shopping.

2. Buy corresponding problem sets according to the bibliography recommended by Nanjing University, and many topics are also of reference value.

3. Go directly to NTU's senior sister.

4. Aren't there many cloud disks on the Internet? There are usually a lot of gains.

5. It is very unlikely to contact the tutor of Nanjing University! If you can find a mentor, you will make money.

6, online shopping can buy cheap information, but the disadvantage is that it is difficult to distinguish between true and false, and the good and the bad are mixed!

7. Go to Baidu Post Bar, academic exchange websites, and postgraduate forums such as Adventure Treasure. To find resources. Most of them are true questions in memory. If you publish your own real questions in these places, the answers may be inaccurate and need to be verified by yourself.