CF has three telecom zones: China Telecom, China Unicom and China Mobile. Because CF is an online game, you need to be connected to the Internet to play the game, so you need to choose the corresponding telecom zone. Different telecom zones have different operators and servers. Players' intercommunication, leagues and other activities need to be carried out in the same telecom zone. In addition to the three major telecom operators, China Telecom, China Unicom and China Mobile, CF also has some niche telecom zones, such as Jingdong Telecom Zone, Telecom Xiaonetcom, Dewei Telecom Zone, etc. These niche telecom zones may not be large in scale, but they have also attracted the attention and participation of some players.