1.

A: Wow! Tonight’s fireworks display is so pretty!

B: Exactly! Do you know the science behind fireworks? Their “ancestor” is gunpowder—one of China’s Four Great Inventions! 

 

2.

Top banner: Diverse Uses of Gunpowder

Diagram labels: Gunpowder Recipe = Sulfur + Charcoal + Saltpetre; Ancient festive firecrackers; Modern professional fireworks; Controlled engineering demolition 

B: Gunpowder was accidentally discovered by Chinese Taoist alchemists during the Tang Dynasty! Later, through continuous refinement, it wasn’t just used in military applications but was also developed into fireworks and firecrackers, becoming part of our festive culture.

A: So there’s so much wisdom behind fireworks!

 

3.

A: Oh no! It looks like someone littered a cigarette butt and started a grass fire! 

B: This is precisely the point! Gunpowder itself isn't inherently good or bad—fireworks can bring joy, but if sparks aren’t handled carefully, they destroy nature and even cause wildfires, threatening ecological security!

 

4.

Signboard: Protecting Country Parks is Everyone’s Responsibility

B: “Ecological Security” and “Resource Security” within the Holistic Approach to National Security require us to protect nature. Hong Kong has many beautiful country parks, which are precious resources for us!

A: I get it now! Gunpowder can be used for celebratory fireworks, but we must protect nature and not play with fire recklessly! 

B: Exactly! Technology should serve humanity, but we must also safeguard our global home!