He explained with a story:
It seems the phrase is written in a simple substitution cipher (likely shifting each letter by a fixed number, such as Caesar cipher). Let me decode it first. vpn yhtwy ly dwlt alkwyt
In the bustling digital city of Netville, every house had a public address — an IP number. When Mia sent a letter to her friend Leo, the postal service (Internet Service Provider) could see exactly where the letter came from, where it was going, and even peek inside if they wanted. He explained with a story: It seems the
v → e p → k n → m space y → b h → s t → g w → d y → b space l → o y → b space d → w w → d l → o t → g space a → z l → o k → p w → d y → b t → g When Mia sent a letter to her friend
Here is your : Title: The Invisible Tunnel
Result: — still not a clear phrase.