Wang said that experts generally believe that ancient languages are better preserved in the south. For example, Xiamen people call pigs "land", which was pronounced in Qin and Han Dynasties. Fujian people call the pot Ding, which is also an ancient name. The north, especially Guanzhong, including Xi 'an, used to be the main battlefield, with a large population flow and rapid language changes.
Chen Feng, a native of Panyu, Guangdong Province, was a famous Confucian scholar and phonologist in the Qing Dynasty. In Shu Dong Ji, he said that Cantonese was suitable for the rhyme books of Sui and Tang Dynasties, which was beyond others' reach. ..... The four tones are all clear, and the words are clear when reading ancient books. ..... Zhu Ziyun: "There are many voices in all directions, but the voices spoken by Cantonese people are still good." ..... The reason why Guangzhong people have a good voice is because people from the Central Plains have moved to Guangzhong for thousands of years, and today's Guangyin is the voice of the Central Plains in Sui and Tang Dynasties. "There are many Rusheng words in Tang poetry, but today there are no Rusheng words in Guanzhong dialect, and there are Rusheng words in Jiangsu dialect." On the issue of entering tone, Yang Encheng and Zhang Chong have similar views. Yang Encheng also believes that the current Guanzhong dialect cannot be equated with Chang 'an dialect in Tang Dynasty, and the language changes with the migration of population. After the Five Dynasties, a large number of Shaanxi literati moved eastward to the south of Huaihe River, bringing Chang 'an dialect to Jiangsu, Anhui, Fujian and other places, while people from northwest areas such as Ningxia moved into Guanzhong, bringing many other dialects.