Cross border special lines take Hong Kong's sufficient international bandwidth resources as a springboard. Overseas data is transmitted through exclusive international special lines, without going through China's Internet international export, bypassing the bottleneck of Internet export, ensuring that the average transmission delay of data interaction is about 20ms, and the packet loss rate is less than 1/10000. Fundamentally ensure the smooth data exchange of multinational enterprises, and the implementation cost is only a fraction of the cost of directly renting international data lines, with a good performance price ratio. The main switch of 10GbE optical fiber direct connection cabinet guarantees the bandwidth availability rate of more than 99.99%, which solves the problem of unstable or slow access to foreign networks for domestic dedicated line customers.