How many manufacturers produce ammonium sulfate in Shangyu?

Two. According to Baidu map query, there are two manufacturers producing ammonium sulfate in Shangyu, namely Zhejiang Hongsheng Chemical Co., Ltd. and Shangyu Jinguan Chemical Co., Ltd. Shangyu District belongs to Shaoxing City, Zhejiang Province, located in the east of Zhejiang Province, northeast of Shaoxing City, south bank of Qiantang River and east of Yuyao City, Ningbo City.