How to fill the pen with ink?

The method of adding ink to the pen is as follows:

Preparation materials: a pen and a bottle of ink.

Steps:

1. Turn the back cover of the pen counterclockwise.

2. Pull the movable pen tube piston and put it into the ink.

3. The ink submerges the nib and slowly releases the elastic piece of the pen tube.

4. Take out the pen and wipe it with a paper towel to write normally.