Thinly slice the cabbage. Place it in a microwave-safe container, add 1 tbsp of water, cover loosely with plastic wrap, and microwave at 600W for 1 minute. Drain and let cool. Cut the grilled tofu in half along the shorter side, then cut into 8 equal pieces along the longer side.

Cut the pork belly slices in half. Lay them out lengthwise, sprinkle evenly with salt. Place one piece of grilled tofu and a portion of cabbage at one end, then roll tightly. Repeat to make 16 rolls. Dust the rolls lightly with all-purpose flour.

Heat vegetable oil in a frying pan over medium heat. Place the rolls seam-side down and cook for about 3 minutes. Flip the rolls, blot excess oil with a paper towel, cover with a lid, and cook for 1 more minute. Remove the lid and cook until the pork is fully cooked.