Having inherited the excellent qualifications of the former Naval Engineering Construction General Bureau and taken the hydraulic engineering construction as its characteristic and core superiorities in this sector, COAG possesses four grade-one certificates for general contracting or specialized contracting as well as nine grade-two certificates that integrate harbor and channel engineering, building and decoration engineering, public utility engineering and complete sets of equipment etc. After years of arduous exploration and practice, COAG has possessed strong engineering construction capability, accumulated rich engineering management experiences, built up a high-quality technical management team and constructed a large number of domestic and foreign engineering projects such as harbors, wharfs, as well as industrial and civil buildings, some of which are the state key ones.