What did the ancient people in China (such as people in the Tang Dynasty) say, and is it close to Cantonese now?

Some ancient words are reserved in seven dialects, but it is said that experts have identified more than 90% Cantonese as similar to ancient Chinese.

Someone here also asked:

/b/3586949.html

Mandarin:

Old sayings are less preserved. Although every Chinese dialect has inherited many ancient Chinese words, relatively speaking, few ancient Chinese words have been preserved in dialects in Mandarin dialect areas. For example, the word "eye" is widely used in Putonghua dialect, but it is still called "eye" in Fujian dialect and "eye" in Guangdong dialect, retaining the name of this human organ in ancient Chinese. Another example is the word "Li", which is called "Li" in Wu dialect, and "Qi" in Fujian, Guangdong, Hakka, Jiangxi and other dialects except Mandarin dialect area and Hunan dialect, all of which follow the old Chinese saying; In addition, there are some words that are very commonly used in life. Southern dialects retain ancient sayings, while Putonghua dialects use the same expressions as modern Putonghua. For example, the common "Kan" in Mandarin dialects; Guangdong dialect and Fujian dialect (in some areas) use the ancient word "Zi".

More detailed:

/video/ShowSoft.asp? SoftID=798