Cooking tips:1. This method can keep the freshness of the ribs without blanching the water. 2. The thin starch can keep the water in the ribs without losing. 3. Add two times of vinegar - the first time is adding vinegar before adding water to keep the smell of vinegar. The second time is adding vinegar before leaving the pot is the sour taste of vinegar. OK. Friends who like ribs have a try. They have skills in making delicious dishes.