Since the 1990s, the post and telecommunications industry has gradually been structured to adapt to the socialist market economy system, following the distribution of post and telecommunications camps, mobile separation, north-south splits and 3g photographsTelecommunications operationsIndustry, with telecommunications operators such as china telecommunications, china connectivity and china mobile, provides a full range of communications services. But it also raises an inescapable question: networks between these different telecommunications operators need to be connected, i. E., interconnectivity, because of the customer's need for full communications. Without interconnectivity, customers can communicate only within their respective telecommunications operators, unable to meet the requirements of universal communications services, and less likely to have international telecommunications operations, e-commerce, internet applications, etc。