Impossible? The provincial governors filled in when the central government became ineffective. Practically ceased to exist. The provinces became warlord states in filling the vacuume. This has repeatedly occurred in global history, and in Chinas history. Roman central government became ineffective and the empire disintegrated into multiple states. The Austrian Empire flew apart into four or five new separate nations and other territories joined neighboring states, There are endless examples of this across five or six millennia. The details vary, but Chinas empires have disintegrated into waring states or civil wars over and over.
Nations are always man-made constructs.
Had the state faced a great enemy that threatened its liberty/survival. It is always convenient to invent some fable and tales to show why its independence is justified, "we are a different nation differ from those lowly bastards in the north, we don't eat shit".
This happens a lot. Slovakians never had their own state, yet they try hard to prove that they worth one. Finns and Estonians emphasised a lot about their yellowness and their Asiatic heritage. Turanism could happen in Finland and Hungary, then why not in Manchuria where Manchu speaks a Tungistic language. Surely Manchuria has more Turkic ingredient than that in Finland
In Serbia is a farce, initially nobody believes there is a term called "Bosnian", yet Bosnian is invented due to Serbian threat, and then Macedonians, sooner or later Kosovan will come to existence, these are the course of newborn nations. If Kosovo can invent a new nation there is no reason Hokkien and Canton could not invent one, their language is incomprehensible with Pekinese Mandarin, lives, customs and economic circles differ greatly. All they need is a "Serbia" bad guy