Which bureau of China Railway ranks first in strength?

The first place in the strength of China Railway Bureau is the Fourth Bureau. In China Railway 10 Engineering Bureau, the comprehensive strength of China Railway 1 to 10 Bureau is the strongest, followed by 6 Bureau and 9 Bureau. China Railway Fourth Engineering Group Co., Ltd. is a large-scale construction enterprise with comprehensive construction capacity. He is a key member of China Railway Corporation, a fortune 500 enterprise in the world. Hold the special qualification of railway engineering general contracting, housing construction engineering general contracting and first-class qualification of highway, municipal and electromechanical installation engineering general contracting. Railway track laying and beam erection engineering, railway electrical engineering, railway electrification engineering, telecommunication engineering, highway subgrade, highway pavement, highway traffic engineering, bridge engineering, tunnel engineering, architectural decoration engineering, steel structure engineering, fire protection facilities engineering, environmental protection engineering, hydraulic tunnel engineering professional contracting qualification, urban rail transit engineering professional contracting qualification, special professional engineering qualification, environmental protection engineering first-class qualification, geological disaster control engineering first-class qualification, construction industry (building