1. Marinate pork ribs with salt overnight, then blanch in boiling water to remove the scum, drain.
2. Cut off both ends of kohlrabi, peel and dice. Note that the top end should be cut deeper to remove the most fibrous part of the kohlrabi.
3. Heat wok, sauté white peppercorns until fragrant, then crush the peppercorns.
4. In a large pot, pour hot water, add the white peppercorns, then the kohlrabi and pork ribs, stew for half an hour, then add diced Chinese celery, cook another 2-3 minutes, serve.