through the enterprise credit certification of the National Comprehensive Credit Evaluation Center, the comprehensive analysis and evaluation of SDGI enterprises' good credit records, business conditions and development prospects, etc.,

28th, the 24th China Expressway Information Technology Products Exhibition was grandly held in Hunan·Changsha International Convention and Exhibition Center. The meeting discussed in depth the application and development of new generation information technology in the planning, design, construction, management and operation of expressways.