Who has the historical materials of Ya 'an?

Ya 'an has a long history and was brought under the jurisdiction of the central government in the pre-Qin period. The cultural history of the Han Dynasty is rich, and in modern times, it has left a magnificent poem of "the tragedy of the wing king, the victory of the Red Army". Ya 'an is a natural oxygen bar with beautiful mountains and rivers and good ecology, with an average annual rainfall of about1.800 mm. It is known as the rainy city and the region with the most rainfall in Sichuan, and is known as the "three elegance" of elegant rain, elegant fish and elegant women.