I'll say a simple way to categorize vegetables. Vegetables can be divided into three simple categories. The first category is leafy vegetables, mainly the leaves of edible vegetables. For example, spinach, cabbage, Shanghai green. The second category is the fruit category, which is mainly the fruit of edible vegetables. For example, eggplant, tomato. Pepper. The third category is the tuberous root category. For example, sweet potatoes, potatoes.