What's a "shimen"?
may he means the stone gate
Dang, I still couldn't help then.All the gates we've seen so far are made of wood.
Edit: I tried looking up the word, but all I got was a city name, "sun/sky/etc", and "four walls".I still have no idea what this word is or why it's being used.
Sorry, there is a problem translating it using software, which has caused you trouble