Plant ash cannot be eaten directly, but it can be used as medicine. Moreover, in Guangdong, Guangxi, Zhejiang and other places, glutinous rice is soaked in plant ash when making rice dumplings, which will make it softer, more fragrant, softer and have a better taste. In this way of eating, after the rice dumplings are cooked, the gray juice rice dumplings will turn yellow and taste more fragrant than ordinary rice dumplings