You have to constantly accumulate "taste" experience. You will know the quality after eating too much. For example, if I give you a dish, you taste it and find that the same dish you have eaten before is more tender than this one. Or crispy, etc. Naturally, you can tell the difference between good and bad. However, everyone has their own preferences. For example: sweet in the south, salty in the north, spicy in the east and sour in the west. "As the saying goes, "it's difficult to adjust to everyone's taste", so it's difficult to give." The next definition of "food". "Is it delicious or not?" is actually very subjective, and it is difficult to objectively evaluate food. Finally, I personally recommend you to watch more of Cai Lam's programs. The old man has certain opinions on eating.< /p>