1, eggplant in the growth process, short sunshine, not enough sunshine, in order to increase the yield of eggplant, partial application of nitrogen fertilizer, increased the bitter pigment of eggplant;

2, old eggplant, high content of eggplant alkali, fried will be bitter;

3, fried too long will also be bitter;

4, eggplant soaked in water Too long, when frying in a big pot, it is not advisable to put water, and it should be stirred through with medium heat;

5, the storage temperature of the eggplant is about 10 degrees Celsius, and the refrigerator's freezing temperature is from 0 to 8 degrees Celsius, so the eggplant will be placed in the refrigerator in the cold storage will appear in the case of cold damage, that is, the center of the blackening, which is the internal structure of the eggplant is changed, and there is deterioration of the deterioration of the taste of the eggplant, and therefore the eggplant will be bitter;

6, Stir fry process, even if very normal eggplant, more salt, will change the flavor, excessive salt will generally appear to have a bitter taste of the dish, so salt put more, eggplant will be bitter.