There is a pot opposite. Slightly take a left turn and exit the dining area. In the opposite you can see a portrait and towards the left you can see an open space. Enter into that room. Turn around and exit the room. Slightly take a right turn and enter into the room which is beside the staircase towards your right. Walk through the narrow passage. You can find a portrait towards the right. Enter into the open door and stand before the closed door. This is the end point.