Established in 1992, the government of hunan province "changzhutan regional planning leading group", the formal changzhutan information integration are put forward.In May 2003, changzhutan cancelled CDMA long distance, roaming between three cities, both local calls.In June 2009, three fixed telephone area code, have a huge role in construction of information integration;After entering the "twelfth five-year" period, rapid advance information construction, information infrastructure construction and platform construction and so on various aspects Made great achievements. <<