Haiyan county situates at the hangjiahu plain in China, among which is shanghai, hangzhou and suzhou. The bridge across hangzhou gulf which is the longest in the world will be located at haiyan. The traffic at haiyan is convenient, and its economy is prosperous. Heretofore, the history of sericiculture at haiyan has more than 4,700 years, sericiculture has been the characteristics of the industry of haiyan, and it becomes the main source of economy of haiyan. The area of the garden of the ...
China