The manager of the store where the golden ox is sold tells the officers that the store is the only one in the whole city that sells this model of the taurus. He tells them that the customer who bought the ten gold bars and the ten discounted necklaces was actually a generous customer, who bought eight gold bars plus the ten necklaces for a total purchase of 300,000 yuan. The man who bought all the gold and jewelry is the one who got robbed.