Approved as a Grade-A construction supervision unit by the Ministry of Construction, CTIEI started its engineering supervision business in 1986 and has already carried out the supervision business for industrial and civil projects with a building area of 3,000,000㎡ plus. Among them, CTIEI was awarded a Great Wall Cup prize of Beijing for the fourth section in Nanxiaoying Residential Area; was awarded Great Wall Gold Cup prizes for two(2) items and awarded Great Wall Silver Cup prizes for thirteen(13) items in Huafang Chaoyang Project . In 2006, CTIEI was chosen as a model engineering supervision unit by Beijing Construction Supervision Association.