In the place known as the "Absolutely Transparent City," everyone's transaction records and heartbeat data are displayed in real-time on the municipal blockchain screen. There are no secrets here; privacy itself is considered a sin, and "data purity" has become the passport for employment.

Zhang San is a model citizen of this city. For ten years, his data record has been flawless—every transaction is transparent, even his dreams are uploaded to the public ledger. Finally, the top-tier company "Panorama Tech" extended an olive branch to him, inviting him for an interview.

The interviewers looked at his completely open life trajectory and praised him endlessly. The final step was routine: retrieving the full transaction chain. The screen flickered with data, and the review proceeded smoothly—until suddenly, a record popped up.

"2024-X-X, Interaction Protocol: @dusk_foundation. Details: Data is invisible due to zero-knowledge proof technology."

The conference room instantly fell into dead silence. The chief interviewer’s voice trembled: "Invisible? In your so-called 'transparent' life, how could there be something 'unseen'? This... this is a stain, a black hole of privacy!"

Zhang San remembered—he had only been curious that day, clicked on Dusk’s official website, and used DUSK tokens to make a small transfer of a few dollars. He hurriedly explained, "It was just a technical test, the amount was negligible!"

"The amount doesn’t matter," the interviewer’s fear was evident, "what matters is the act of 'invisibility' itself. It indicates you have hidden intentions, and you possess the ability to protect privacy—this is the highest level of ideological suspicion here."

A once-perfect citizen image instantly collapsed. Due to an unintentional exploration of privacy technology, Zhang San became the most "dangerous" person in the city. The story ended with him politely being escorted out, with a permanent record on his file stating "deliberate concealment of data."

Walking on this absolutely transparent street, Zhang San smiled for the first time at that single "stain" record. Perhaps, the ability to choose privacy itself is proof of freedom.