Upon entering the shop district, one immediately spots a large signboard for "Bo Gu Zhai" – a sizable establishment with a grand entrance.,Against the wall, there is a shelf surrounded by a railing. The shelf is covered with glass and locked. Underneath the shelf are rows of cabinets filled with jade and stationery.,Mr. Wu smiled without making a sound. Liu, the shopkeeper, had a smile on his face. The old man was testing him, wasn't he。