How to write with chalk in running script and how to change the pen tip

1. First, gently press the head of the book chalk with your fingers, and then pull out the pen head with force.

2. Insert the new pen tip into the core barrel of the book chalk, and then press it gently until the pen tip is fixed.

3. Return the book chalk to the point of sale or seek help from professionals to ensure that the pen head is installed correctly.