1, pick the cabbage, clean, do not rush to put it into the pot stir fry. To first fill the basin with water, add a few drops of lemon juice to the water, if there is no lemon juice, you can also use white vinegar instead. Then we put the cabbage in the water to soak for about ten minutes. Then we remove the cabbage from the water and drain it before frying. The acid in the lemon will prevent the iron in the cabbage from turning black.

2, when we fry the cabbage, we must use high heat to fry quickly. The whole process of frying is best not more than three minutes. The use of high fire and quick frying can shorten the time of contact between the hollow cabbage and the iron pan, so that you can avoid the blackening of the hollow cabbage.

3, hollow cabbage in the pot before, we can pour a small amount of water starch into the pot. This will be able to lock the water in the cabbage, which can prevent the cabbage from oxidizing and turning black. Let the appearance of the cabbage looks more bright green.

4, everyone in the hollow cabbage for plating, do not directly pile up. We have to leave a small hole in the middle, this can make the cooling speed of the cabbage faster, to avoid them piled up together so that the temperature can not be dispersed, so that the cabbage turns black.