How to make a hero pen?

1, unscrew the pen holder anticlockwise, and remember that the direction is not wrong, so as not to screw it tighter and tighter, and finally it won't open, as shown in the following figure;

2. After selecting the same counterclockwise direction, you can take out the used ink bag or ink absorber, as shown in the following figure;

3. Put down the old ink absorber, take out the new ink bag, insert it directly into the pen container, and hear a click, and the installation is complete, as shown below;

4. Turn the pen clockwise again to complete the installation of the whole pen, and then it can be used normally, as shown in the figure below.