The origin of Tianjin dialect and Suzhou, Anhui Province. Really or not?

There are different opinions about the origin of Tianjin dialect. One argument is that Tianjin dialect is a local dialect, which was gradually formed after the tone evolution of Jinghai dialect. On the other hand, according to folklore, many Tianjin people have heard the old people say that their ancestors lived in Dahuashu Village, Hongdong, Shanxi, and according to relevant information, it is indeed found that many early figures in Tianjin were born in Shanxi, so the records of Shanxi immigrants made some people believe that Tianjin dialect came from Shanxi; The third view is that Tianjin people moved from Jiangsu and Anhui during the period of "Rebecca's sweeping the north", so Tianjin dialect originated from Jiangsu and Anhui. According to the current historical and phonetic research, the third statement is the most credible.

Li Shiyu, an anthropologist in China, found that Tianjin dialect is closest to the dialect of Jianghuai Plain centered on Suzhou dialect, and thought that Tianjin dialect was born out of Suzhou dialect.

Only one tone of Bengbu and Fengyang dialects is different from Tianjin dialect, and the other tones are different from Tianjin dialect. In particular, Tianjin dialect has no Rusheng characters, while Bengbu and Fengyang dialects retain many Rusheng characters. Suzhou dialect is very close to Tianjin dialect. When Li Shiyu talked with the local people in Tianjin dialect, the local people didn't even admit that Li Shiyu was a foreigner, which showed his closeness.