Liu Ruoyu, an eunuch of the Ming Dynasty, recorded in "Zhuizhongzhi" the customs of the Dragon Boat Festival at that time: "At noon on the fifth day of the fifth lunar month, people drink cinnabar and realgar calamus wine, eat rice dumplings, and eat garlic mixed with water." In ancient times, the Dragon Boat Festival and the Summer Solstice were closely related, and we can see the shadow of the custom of eating cold noodles on the Summer Solstice.
"Youyang Zazu_Liyi": "On the summer solstice, there are words for entering the fan and the powder bag." "Fan" is used to generate wind; "pink" is used to smear it, Disperse the turbid gas generated by body heat to prevent prickly heat.
—Eating Summer Solstice Noodles—There has always been a Chinese folk saying of “Winter Solstice Wonton and Summer Solstice Noodles.”
"Winter solstice wontons, summer solstice noodles" continues the ancient proverb in Jinan, Shandong.