Sichuan Chuan Tou Golden Bridge Communication Co., Ltd (CTGB) is the only XDSL industrial base of China with the proprietary of Sichuan investment group and the shareholder of 29th research institute of China .It is established by the by the authorization of State Planning Commission and the Sichuan science and technology hall. By the capital support of Sichuan investment group and technical support CTGB engage in becoming international supplier in ADSL and electric fields, such as: band connection equipment, industrial measurement, electricity measurement, water and electricity auto-controlled equipment, instruments, and so on. CTGB also devote to drive Chinese information industry by the advanced technology and well service.