Buy a entry ticket for all historic attractions in Pingyao (costs 130 yuan). Then visit all the sites. The exchange shop tells the history of trade in the region. Unfortunately, most stories are in Chinese so we missed 'part of the fun'.
Amazing countyard, like a wealthy family. You could learn a lot about Chinese banking system from it and very impressive for its successful story back to 200 years ago. Piaohao is another name in China ancent history for the bank.