The processing steps of citric acid plum juice red dates are as follows:
1. Slice lemon, and wash sour plum and jujube for later use;
2. Blanch lemon slices, sour plums and dates in boiling water for about 10 to 15 seconds;
3. Then put it in ice water and ice it for 5 to 10 minute;
4. Add sugar, mulberry and fruit vinegar, stir well, put the ingredients in a fresh-keeping box, and chill for one night to eat.