Secondly, briefly introduce some skills of choosing a writing pen:
1. pen tip sliding can pull out the pen cover and move the pen tip on the white paper. Generally, the grinding difficulty of the pen tip is on the side. For example, HERO pen moves 30 degrees left and 30 degrees right on white paper. If it is still smooth, it means that the sliding of the pen tip is guaranteed.
2. Check whether there is water leakage, blocking the pen tip and squeezing the pen liner. If it is difficult to squeeze, it shows good water leakage resistance.
3. Write continuously for at least 30 minutes, and you can take a test at home. If continuous writing fails to meet the standard, the performance of the pen is worrying.