True red beans are peeled and white inside. Because the bean skin is very thin, the color of dyed red beans will penetrate the endothelium. After peeling off the red coat, you can see that the inside of the red coat will also change color. Real red beans are bright and shiny as long as they are rubbed by hand, while fake red beans are dull no matter how they are rubbed.

There are three ways to tell whether red beans are true or false. The first method is to look at the bean coat. True red beans are peeled and white inside. Because the bean skin is thin and dyed, the color of red beans will penetrate the endothelium. After peeling off the red coat, you can see that the inside of the red coat will also change color. Real red beans are bright and shiny. If the transportation is fuzzy, it will be bright and shiny as long as it is rubbed by hand, while the fake red beans will be dim no matter how they are rubbed.