C211 Encounter of Narrow Sea and Sea

After Ximen Tianyu and Wang Lih left the guard room, they searched around the outer city's prison. He finally found a hidden door in a room in the northwest corner of the cell. He pulled the switch, and the trapdoor rose with a loud rumble, revealing a flight of stairs. There were no other entrances to this cell. Could this be the entrance to the "Seven Stars Phoenix Point"?

"Master..