1, the appearance of morphology: the color of the dragon beans is generally dark green, the shape is slender, the length is generally between 10-20 cm. While the four season beans have a variety of colors, including green, purple, yellow, etc., the shape is short and wide, the length is usually between 5-10 cm.

2, taste characteristics: due to the different forms, the taste of long beans is relatively tender and not easy to acid, especially suitable for stir-fry. While the texture of four season beans is relatively hard, easy to acid, in cooking need to be cooked for a longer time in order to make it become more tender.