Toss cabbage with salt; place in colander to drain 30 minutes. Squeeze out excess moisture. In a large bowl combine cabbage, pork and remaining ingredients; blend thoroughly.
Place a wrapper in palm of one hand; place 1 heaping tbsp of stuffing in center of wrapper. Fold up sides of wrapper against the stuffing in 4 or 5 places. Carefully pick up remaining folds of wrapper, pressing them evenly against stuffing to shape dumplings into an open topped cylinder. Steam dumplings in steamer for 20-25 minutes.