In the ultracompetitive world of Chinatown dumpling shops, Shu Jiao Fu Zhou stands out. The chewy, crinkled skins are never broken or tough; the pork filling is juicy and just a bit sweet, but never overwhelmingly so. They are somehow always boiled for exactly the right amount of time — a consistency that has been maintained over years’ worth of visits. And at just $2.75 for six or $4 for 12, they are astonishingly affordable.