Steps for making blanched choy sum：Wash the choy sum and set aside. Bring water to a boil in a pot, add a few drops of oil and an appropriate amount of salt. Add the choy sum and blanch until cooked, then remove; do not blanch for too long or it will become soft. Heat oil in a pan and add minced garlic to release its aroma. Pour in steamed fish soy sauce and add a tiny bit of salt, frying until the minced garlic is slightly charred. Pour the sauce over the choy sum, and the blanched choy sum is ready.