1. Before stir-frying the water spinach, you can blanch the water spinach in hot water. The time should not be too long. Then quickly remove it and put it into cold water to cool down quickly. Then heat the oil pan and pour it into the pan. Add more cooking oil than usual, stir-fry at high temperature, and then remove from the pan quickly, so that the stir-fried water spinach will be green.

2. When blanching in hot water, you can add an appropriate amount of salt and white vinegar to the hot water, which can also effectively prevent water spinach from turning black.