1. Wash the lettuce, cut off the skin and old tendons, and use a silk eraser to make fine silk;
2. Add 1 / 2 teaspoon salt and mix well. Leave for 10 minutes;
3. Wash the living shrimps, blanch them in boiling water for 2 minutes, remove the heads and shells of shrimps and put them in the cool boiled water for cooling;
4. Chop the garlic and Chaotianjiao into a bowl;
5. Add white vinegar, sugar and salt, mix well to make sauce;
6. Strain out the surplus water from lettuce and put it into the plate. Put the peeled shrimp on the lettuce. Pour in the sauce and mix well.