Deputy ministerial level. China Railway Fourth Bureau is the level of vice ministerial level. China Railway Four Bureau Group Electrification Engineering Company Limited, is the world's largest construction contractor, the world's top 500 enterprises under the China Railway's three-level independent legal person subsidiary, the company has a railroad electrical engineering professional contracting one-level qualification, railroad electrification engineering professional contracting one-level qualification, electromechanical installation engineering construction general contracting one-level qualification, telecommunication engineering professional contracting one-level qualification, road traffic engineering professional contracting communication, Monitoring, charging integrated system engineering qualification, power transmission and substation engineering professional contracting two qualifications and housing construction engineering construction general contracting three qualifications, the annual construction output value of more than 2 billion yuan, the registered capital of 120 million yuan, with 278 sets of major machinery and equipment.