Network Conditions: As the chief node in Sichuan of CSTNet, The Library is in charge of administrating Chengdu Network Management Center of CSTNet. The network bandwidth connecting Beijing, the network management center of CSTNet, is 155M. The network bandwidth serving every institute in Chengdu of CAS is 1000M. Since the region intelligent wide band network of Chengdu Branch of CAS has been established, the bandwidth serving every household is 100M. Combining network and information is one of our characteristics.