Some people think that "Xia" is named after Xiashui (that is, Hanshui). In ancient books, "Hua" and "Xia" are regarded as the Central Plains, and the four directions are called "barbarians and soldiers". China and Xia used to be common to each other, and the two words are synonymous. China is summer. "China" is also called "midsummer".
For example, Zuo Zhuan, a ten-year-old Confucius proverb, said, "If you don't seek summer, you won't be chaotic." The "Hua" here is also "Xia". Confucius regarded "Xia" and "Hua" as synonyms.
About the time when Shangshu was compiled, Chinese ancient books began to use "Hua" and "Xia" together, which were called "Huaxia".
Kong Yingda, a scholar of the Tang Dynasty, wrote "Justice in the Spring and Autumn Period and Zuo Zhuan": "China is called Xia because of its great etiquette; "The beauty of a badge is called splendor." That is to say, because China is a country of etiquette, it is called "summer", and "summer" has elegant meaning; China people's clothes are very beautiful, pretending to be "flashy". The word Huaxia is not only geographical, but also has a deeper value in cultural deposition.