What are the ten most difficult dialects in China to understand?

Dialect refers to "local language". The types of dialects in my country are mainly divided into four categories. However, many people divide my country's dialects into nine categories, five categories, seven categories, etc. Although dialects are divided into different categories, the most agreeable thing is that no matter how many major categories they are divided into, there are many smaller categories within the major categories. There is even a widely circulated saying, "Three miles away has different tunes, ten miles away has different pronunciation", which means that three miles away, the local dialect has a different tone, and ten miles away, the pronunciation is different. It may sound a bit exaggerated, but Not too far from reality. Our country has a vast territory, abundant resources, and prosperous cultural development. The dialect culture also has a history of thousands of years, with rich historical heritage. The most difficult dialect in China is generally recognized as Wenzhou dialect. The difficulty of Wenzhou dialect has even been brought to the international stage. In a foreign film and television drama, Wenzhou dialect was dubbed "the language of the devil". The title is a language in the movie that even the FBI cannot steal and understand. It enjoys an international reputation and is internationally recognized as obscure. Wenzhou dialect is a dialect in the Wu dialect system. Its pronunciation and grammar are far from Chinese Mandarin. Not to mention outsiders, locals in Wenzhou have different systems across several mountains and rivers. The exaggeration of "ten miles with different pronunciations" is very appropriate when applied to Wenzhou dialect. Wenzhou dialect also played an important role in the war-torn times of the last century. During the war-torn times, Wenzhou dialect was used as a "secret language" to convey important information. People who did not speak Wenzhou dialect could not decipher it. It can be said that it was a later period. Winning has a role. China has a vast territory, and the number of dialects is in the hundreds or thousands. Different cultures blend together in this vast land, creating the multi-cultural aggregation that our country now has. Of course, there are many dialects in our country that are also very obscure and difficult to understand, such as Cantonese, Chaoshan dialect, Hakka, etc.