What was the official language of ancient China?

In ancient China, the official language was elegance, and Confucius also used elegance as a language tool when traveling in other countries. In ancient times, the word "Ya" and the word "Xia" were linked together (at that time, it was homophonic, and everyone pronounced "A" or "Er"), which was elegant, that is, it was the word of China and the orthodoxy of the Han people. Although Cantonese and Min also have some characters of local minorities in ancient Guangdong and Fujian (today's Min also has some elements of Wu), Chinese from the Central Plains was the absolute subject of Cantonese and Min at that time, and the pronunciation of Chinese characters in Cantonese and Min was still the pronunciation of Chinese characters in different periods in ancient Central Plains. The Han people in Guangdong and Fujian immigrated from the Central Plains. Its language was also brought from the Central Plains. It's just a little different in time. It is an indisputable fact that Cantonese originated from the mixture of ancient Vietnamese and ancient Chinese. Cantonese is also called "vernacular". The earliest Cantonese were brought to Guangdong by an army from Hebei 2 100 years ago. The predecessor of Cantonese is also the elegant words of the Central Plains, which is the word of China, the most authentic and orthodox Chinese of the Han nationality and the mother tongue of the Chinese nation. During the Han and Tang Dynasties, a large number of Central Plains immigrants moved south to Guangdong, gathered in Shaoguan, Guangdong, and then distributed to the Pearl River Delta. After absorbing some local languages, the language of the Han people from the Central Plains formed Cantonese, but the absolute subject of Cantonese is Chinese in the ancient Central Plains. Vernacular is spoken not only by the Han people in the Pearl River Delta of Guangdong, but also in some areas of Guangxi, with a slightly different pronunciation. Its name comes from China's ancient appellation "Yue" for Lingnan. One theory is that Cantonese is a mixture of China people and ancient Vietnamese. On the other hand, the ancient Vietnamese language combines Chinese elements and becomes a brand-new language. Minnan dialect was first brought to Minnan by an army from Henan about 1800 years ago. Minnan dialect is the successor of Luoyang dialect in ancient Henan, which is the ancient capital and the seat of the emperor. The ancient Luoyang dialect in Henan Province is the orthodoxy of elegant speech in the Central Plains. Its predecessor was the language of the Western Zhou Dynasty royal family. There were no Han people in ancient south. The Han people in the Central Plains who moved from the Central Plains (such as Henan) to southern Fujian brought Luoyang dialect from Henan to southern Fujian. The former Han people left their hometown with Luoyang dialect in Henan, ran to the south, looked back at the Central Plains, and shouted Luoyang dialect in Henan to the Central Plains, but they didn't expect that their hometown changed later, and the Luoyang dialect in their hometown changed greatly. Later, the Central Plains was occupied by nomadic people, and they became rulers. In the process of sinicization, nomadic people changed the pronunciation of Chinese characters in Luoyang dialect, Henan Province, which led to the fractured development of Luoyang dialect in Henan Province and continued this result. Luoyang dialect in Henan Province split from Luoyang dialect in Henan Province and gradually drifted away, which led to the change that Luoyang dialect in Henan Province is no longer the ancient Luoyang dialect in Henan Province.