Where is the specialty of sweet buckwheat bean jelly?

There is a legend in Dongshan District that Zhao Kuangyin was once shut down from Huang Ze to Shanxi, and it was summer weather. When he arrived at Nanchaguan Temple, he was exhausted and wanted to eat some cold rice. Just a spontaneous Lao shifu brought a bowl of white food. After eating it, Zhao Kuangyin felt cool and palatable, so he asked what this food was made of. The old master said it was made of sweet buckwheat, and then he disappeared in an instant, so he named it sweet buckwheat noodles bean jelly, which has been passed down to this day and is worthy of hospitality.