Is the starting point of Chinese civilization the Xia Dynasty? What did the word "Huaxia" mean when it first appeared?

According to Records of the Five Emperors, the head of the Five Emperors was the Yellow Emperor, who was later called the ancestor of the Han nationality. After the Yellow Emperor, Tang Yao, Yu Shun, Yu Xia and others are the most famous. Yu is the leader of the tribe, surnamed Yu, also known as Dayu. Yu Xia made great contributions to water control, and became the * * * master of the tribes in the Central Plains after Shun, and became the first hereditary monarch dynasty (the beginning of the family) in China, that is, the Xia Dynasty. Xia dynasty was the central government in ancient times, but "Xia people" generally refers to the adherents of Xia dynasty. And "Huaxia" was just a synonym before the Han Dynasty. Confucius "Justice in the Spring and Autumn Period and Zuo Zhuan": "China has a big gift, so it is called Xia; The beauty of service seal is called China. It means that China is a country of etiquette, so it is called "Xia", which means elegance; China people's clothes are very nice, and they pretend to be "China". After the Han Dynasty, "Huaxia" became synonymous with Han nationality and China. At present, in China's credible literature, the word Huaxia was first called "Shangshu Wucheng": "Huaxia is arrogant, but it can't be easily given", which was interpreted by pseudo-Confucius as "crowned with clothes, and a big country is summer." "Zuo Zhuan Ding Gong Ten Years" "I don't want summer, I don't want chaos in China. "Spring and Autumn Justice and Zuo Zhuan": "China has a big gift, so it is called Xia; The beauty of service seal is called China. "It means that the Zhou Dynasty is a state of etiquette, so it is called' summer', which means elegance; People in the Zhou Dynasty wore beautiful clothes and pretended to be "flashy". In the pre-Qin era, Huaxia was only synonymous with the Zhou Dynasty. At the same time, all the vassal states that abide by etiquette and justice are China people and Xia people, collectively referred to as Harmony. The vassal states that don't respect the Emperor Zhou and aren't Zhou's nephews and uncles are all regarded as "barbarians", and even the Wu Kingdom of Zhou's royal family doesn't respect the ceremony and is king. For example, as a descendant of Xuanyuan Huangdi, Tan Guo was sometimes regarded as "China" and sometimes as "Siyi"; Ju and Guo, both descendants of Xuanyuan Huangdi, were regarded as barbarians by Lu, and Jin, both descendants of Zhou royal family, was regarded as brothers by Lu. In pre-Qin ancient books, "Hua" and "Xia" are the Central Plains, while "Yi" and "Yi" are the four directions. China is also called China, Midsummer, Middle-earth and China. Some historians believe that the words Hua and Xia were homonyms in ancient times. In Zuo Zhuan, the phrase "Chinese people don't seek summer, and foreigners don't mess with China" means that China and Xia are synonyms, and China is summer. After the birth of the Han nationality, "Huaxia" became synonymous with the Han nationality.