Many restaurants in Shanghai charge a bottle-opening fee for any wine brought by customers themselves. The typical amount is 50 RMB per bottle. I didn’t know the reason of this pricing and thought it was too expensive.
Recently, when I compare the purchase price and the retail price of the wine, I started to form a theory that they charge for 50 RMB, because that is the typical margin for them to sell a bottle of wine there. For example, a bottle of wine priced at 100 RMB/bottle are likely to have about 50 RMB as purchase price. Does it make sense?