Why are Qingxian County in Cangzhou, Hebei Province called "Tianjin Sub-dialect Area"?

Cangzhou's cultural structure is not single. Cangzhou has four dialect areas, the southern part belongs to Cilu dialect area, the central part belongs to local dialect area, the northern part belongs to Tianjin sub-dialect area, and the western part belongs to Jizhong dialect group, a north China mandarin system. Qingxian and other places asked by the landlord belong to the northern region. First of all, geography is one reason. The north of Cangzhou is close to Tianjin, and the exchanges between the two places are relatively close. With more communication, the language is naturally influenced by Tianjin dialect. Historically, in the second year of Yongle in the Ming Dynasty, Tianjin was built, with left guards and right guards, which governed Wuqinghe and Cangzhou Jinghai. In the ninth year of Yongzheng (173 1 year), Tianjin was upgraded to Tianjin Prefecture, which governed six counties: Jinghai, Qingxian, Cangzhou, Yanshan, Nanpi, Ningjin and Qingyun. Since Tianjin once administered Cangzhou, it is not surprising that dialects in some areas are close to Tianjin dialect. From a cultural point of view, there are countless film and television works involving Tianjin, such as Qing Artillery, Magic Whip, Fake Fighting the Chivalrous Man, Young and Old Men Appearing in Court, Legend of Masons, Bloody at Tianjin Gate, Big House Gate, Three Children, Horse, Legend of Dog Ignore and so on. Even now, I'm afraid the horse crosstalk has a special charm for you, me or most people.