Before the reform and opening up, drying equipment was mainly imported from Japan, Europe and the United States. 1980, the first collectively-owned drying equipment manufacturing enterprise in China opened in the Yangtze River Delta, where the first township chemical enterprise was born. It is said that in the Yangtze River Delta, which has a relatively developed economy, and after 20 years of development, there should be several large-scale enterprises in the field of drying equipment manufacturing.

　　However, the drying equipment manufacturing enterprises most concentrated in Changzhou City, although the total number of enterprises as many as more than 300, but the annual sales revenue of more than 100 million yuan of enterprises, only one senior companies in 2002 when some of the unprecedented to reach 100 million yuan of sales revenue, and before and after only that time. Other better companies have sales of 50-60 million yuan a year, and the average company is around 20 million yuan. But in the same period of time the development of local private chemical enterprises, a year sales revenue of billions of yuan of no less than a few dozen.