Jiashan County, Zhejiang Province has developed cotton yarn and cotton production. At that time, there was a rumor that "Songjiang cloth was not enough and Tang Wei yarn was not enough". (Zhejiang Tongzhi, Volume 102, Product) Due to the dry climate, cotton wool can't be bundled. Although it can be made into cloth, its quality is not good and cotton production is difficult. During the Wanli period, weavers in Suning County, North Zhili created a method to improve the quality of cotton cloth. "Wear more cellars, a few feet deep, and build houses on them. The eaves are only two feet higher than the ground, and there are windows to let the sunlight through. Living in it, you can spin with moisture, thus weaving high-quality cotton cloth. The market horses produced in Suning County account for one-tenth of Songjiang's output, and the quality is getting better and better, and the fineness is similar to that of Songjiang's Chinese products. (Encyclopedia of Agricultural Management, Volume 35)

Commodity economy is very active.