one thing i've taken for granted growing up in america, was the ever present availability of doughnuts.  whether its my favorite organic, vegan doughnut from seattle's(one of CQ's sister cities) "Mighty O,"  or a pack of the hostess donettes from the nearest gas station, doughnuts, in america are everywhere.  and no matter where you are, its not easy to find a bad doughnut.  of course some are far superior to others, but most doughnuts are in some way enjoyable, even in china. 
i have found one however that goes beyond merely being enjoyable (i would go as far to say it is absolutely delicious), and that is the dico's doughnut.  yes dico's the over-priced fast food haven finally gives us a reason to enter its doors and that reason comes in two flavors, powdered sugar, and chocolate.  both being tasty, the chocolate exceptionally so, and at RMB3 and 3.5 respectively you can't go wrong.