Are there many binding factories in Hebei Sanhe?

A lot. According to Shunqi.com, there are 20 bookbinding factories in Sanhe, Hebei. They are sanhe city Dexin Printing Co., Ltd., sanhe city Jin Xuan Printing Co., Ltd., sanhe city Yanjiao Tianhua Printing and Binding Co., Ltd., sanhe city Yanshan Printing Co., Ltd., sanhe city Baifuchun Printing Co., Ltd., sanhe city Tian Xiang Printing Co., Ltd., Sanhe Jinyuan Printing Co., Ltd., Sanhe Xiangda Printing and Packaging Co., Ltd. and Sanhe Caiheng Printing Co., Ltd., Sanhe Guike Printing Equipment Sales Co., Ltd., Sanhe city Parkson Printing Co., Ltd., sanhe city Shunxing Printing Co., Ltd., sanhe city Jinglan Printing Co., Ltd., sanhe city Yanfeng Printing Co., Ltd., sanhe city People's Printing Co., Ltd., sanhe city Shuangfeng Printing and Binding Co., Ltd., sanhe city Beiyan Printing Co., Ltd., sanhe city Chenbo Printing Co., Ltd., Sanhe Tongli Color Printing Co., Ltd. and Sanhe New Jinma Printing Co., Ltd. ..