According to legend, when the soul crosses the River of Forgetfulness, it forgets all that happened in its lifetime, and everything that once existed is left on the other side, blooming into large and shocking red flowers, blooming with an enchanting, almost red-black color. From a distance, it looks like a carpet paved with blood, like fire, blood, and tea. Therefore, Bianganhua is also known as "Manzhu Shahua."