Using the information Caishen has given him, Xiuying got three fake name tags for himself and two of his members before he and his whole team made their way to Shi Town.
Once they arrived, Xiuying's men found different inns to lodge in first, in order not to create suspicion. When morning came, he and two of the men set out for the hills.
Just as it was described, a very tall-walled structure stood in the hills. Its walls made it such that nothing within the building can be seen from the outside except for the smokes from the chimneys.
And like he was told, its gates were very well hidden. He himself wouldn't have spotted them fast if he didn't have the foreknowledge.
Xiuying and the two members went to
where the 14"x14" square shaped hole blocked with a thick wooden board was, which can only be opened from inside the walls.
Xiuying knocked on the wooden board covering the hole as Caishen had told him.