You can't. According to official website of State Grid Corporation of China, the Master of Electronic Information Engineering of Chongqing University is not allowed to apply for the system unit of State Grid Corporation. When State Grid Corporation recruits college graduates every year, it mainly recruits electrical engineering and automation majors, mainly involving the scope of strong electricity, mainly engaged in the operation, maintenance and management of primary equipment in substation power system, while electronic information engineering majors mainly involve weak electricity majors, and the graduates' main employment destination is the communication system units of the three major operators.