Caroline turned to look at me and asked with a ferocious face, "What's this? Tell me what it is!"

"What's this?"

I was a little confused.

To be frank, although I knew how to perform some basic operations on a laptop, I didn't know how to hide a file.

What's more, I didn't even know that a folder could be encrypted.

And regarding a series of smooth operations Caroline had made on my laptop, I hadn't seen anyone do them previously either.

Caroline stared at me and said, "Stop pretending!"

"I indeed don't know what you are talking about." I narrowed my eyes and tried hard to see clearly what...