Combine pork, cabbage, chives, soy sauce, sesame oil, rice vinegar, salt, pepper and garlic powder in a mixing bowl. Mix together really well.
Start filling the wonton wrappers. To easily make the dumplings, fill a small bowl with water and keep it on the side. Dip your finger into the water and gently wet to outside edges of the wonton wrappers. Take about 1tbsp of filling and place in the middle. Fold in half and press together. Repeat this. If you aren't familiar with folding dumplings or want to make them more intricate, please see my notes below.
Once almost all the dumplings are filled, begin to boil your water for steaming. Place the dumplings in your steamer and steam for 10 minutes. Do this in batches.
While the dumplings are steaming, let's make our sauce. In a small bowl combine the mala sauce, rice vinegar, soy sauce, sesame oil and water. Mix together well, add the scallions.
The dumplings should be done by now, I like to drizzle the sauce on top and serve on a platter with some fried rice on the side. Eat and enjoy!