Shandong Guangzheng communication Technology Co., Ltd., formerly known as Shigu Coal Mine of Zibo Mining Group Co., Ltd., successfully completed the shareholding cooperation transformation in September 2009. It is an entity enterprise that insists on diversified development. The subsidiaries of the group company are: Zibo Guangzheng Aluminum sulphate Salts Co., Ltd., which mainly produces aluminum sulfate and iron-free aluminum sulfate, which are used in papermaking, water purification, building materials, titanium dioxide, pharmaceuticals, oil exploration and other fields, with an annual designed production capacity of 10 10, 000 tons, is a leading enterprise in the same industry; Qingdao applied photonic technologies Co., Ltd. is a mature optical communication product manufacturer in northern China, and a shortlisted supplier of China Mobile, China Telecom and China Netcom; Zibo Guangzheng Logistics Co., Ltd. is mainly engaged in coal and Warehousing and logistics, and the "Guangzheng Smart Logistics Industrial Park Project" prepared by the group company has been selected into the list of key projects in the service industry of Zibo in 2022.