Before the Song Dynasty, the vast plain area in the south of Pingyang was not greatly developed. After the Song Dynasty, Jiangnan and other places gradually developed. Later, with the growth of population, the economy gradually moved south. The most important proof is that after the Song Dynasty, Pingyang's main market was mostly in the south, such as Cang Qian (Cang Qian) Yishan (Yishan) Jingkou (Shuitou) Rake Tank City. From the late Qing Dynasty to the Republic of China, the economic center was Aojiang River.
From the late Qing Dynasty to the Republic of China, Kunyang's urban economic development was relatively backward. As far as characteristic industries are concerned, there are only a few flour mills, dye houses, brush houses, printing houses, umbrellas and sauce gardens. Although Kunyang is the county seat and political center of Pingyang, it is not the economic center of the county seat. The economic and commercial center of Pingyang is located in the port town-Aojiang Town. Indigo and grain are mainly exported through Kunyang. Most of these goods come from the south and the south.
Due to the separation of political, economic and commercial centers, and Kunyang is located on a high slope, as the traffic throat of Zhejiang and Fujian provinces, Kunyang has its own advantages in the cold weapon era. However, after entering the era of reform and opening up, due to geographical reasons, the centrifugal force on seven districts and one town in the south increased, and the population base of Pingyang old county was too large at that time, reaching 1.59 million, making it the second most populous county in China. At that time, Pingyang county, with a history of 1.700 years, finally experienced the biggest administrative division change, which was divided into Cangnan and Pingyang counties.