airplane mode

Features airplane mode

Q: What is yc?A: There is a mysterious nation exists in our universe, its hard to find.
I once met a citizen of that nation, we talked much, changed numbers with each other in the end.
After I came home, I JUST cant remember the content of the conversation, but I always have good memory.
I open the note on which he wrote his phone number, ha, weird, there is no number, just 2 letter.Q: y and c?A: yes.