220 Yuan in China can buy a lot. For example, I can buy around 70 large 600 ml bottles of average quality Chinese beer with 220 Yuan. But 2 Quid in the UK is nothing when you go to the shops.
That's not a bad price for 70 of the large bottles. I noticed that like chocolate boxes in UK have shrunk the bottle size had mostly been cut to 580ml for tsingtao and similar. I don't think you'll get a better price in Northern China- and the tins will be prohibitive. Do you buy the beer in any particular shop? Walmart maybe-they do the large bottle. No you certainly buy your beer cheaply-you won't find an FT buying cheaper beer, that's for sure.