1.

A: What is this piece of wood?

B: This is a type piece used in movable type printing! Bi Sheng of the Northern Song Dynasty invented movable type printing, which allowed individual characters to be arranged to print books in large quantities. This greatly advanced the spread of knowledge! 

2.

B: Look! Once you arrange the characters, you can print countless identical pages. Printing made education no longer an exclusive privilege for aristocrats; ordinary people could finally read books too!

A: That's amazing! So it’s just like how we can “share” something with a single click on our phones nowadays to let lots of people see it. The basic concept is the same!

3.

A: Hey, this website says that if I enter my personal information, I can redeem free theme park tickets! Let me share this with my classmates! 

B: Hold on a second! While printing technology can replicate “good things” on a large scale, bad people can also use it to replicate “fake things”! Phishing websites like this are designed to steal your personal data, which threatens cybersecurity!

4.

B: Printing relies completely on having an “accurate source.” If a mistake is made during typesetting, everything printed afterward will be wrong! The online world works the same way—before clicking and sharing, you must always check whether the source is trustworthy!

A: So we shouldn’t blindly click on unfamiliar links, and we shouldn’t just enter our personal information anywhere!

B: Spot on! In the Holistic Approach to National Security, “cybersecurity” relies on every single one of us staying highly vigilant!