中国坚持“自主、开放、兼容、渐进”的原则建设和发展北斗系统。
——自主。坚持自主建设、发展和运行北斗系统，具备向全球用户独立提供卫星导航服务的能力。
——开放。免费提供公开的卫星导航服务，鼓励开展全方位、多层次、高水平的国际合作与交流。
China upholds the principles of "independence, openness, compatibility and gradualness" in the BDS construction and development.
- By "independence", it means to uphold independent construction, development and operation of the BDS, and acquire the capability to independently provide satellite navigation services to global users.
- By "openness", it means to provide open satellite navigation services free of charge, and encourage all-scale, multilevel and high-quality international cooperation and exchange.
——兼容。提倡与其他卫星导航系统开展兼容与互操作，鼓励国际合作与交流，致力于为用户提供更好的服务。
——渐进。分步骤推进北斗系统建设发展，持续提升北斗系统服务性能，不断推动卫星导航产业全面、协调和可持续发展。
二、持续建设和发展北斗系统
- By "compatibility", it means to enhance BDS compatibility and interoperability with other navigation satellite systems, and encourage international cooperation and exchanges, so as to provide better services to users.
- By "gradualness", it means to carry out the BDS project step by step, enhance BDS service performance, and boost the development of satellite navigation industry in a comprehensive, coordinated and sustainable manner.
II. Development of the BDS
中国始终立足于国情国力，坚持自主创新、分步建设、不断完善北斗系统。
（一）实施“三步走”发展战略
——第一步，建设北斗一号系统（也称北斗卫星导航试验系统）。1994年，启动北斗一号系统工程建设；2000年，发射2颗地球静止轨道卫星，建成系统并投入使用，采用有源定位体制，为中国用户提供定位、授时、广域差分和短报文通信服务；2003年，发射第三颗地球静止轨道卫星，进一步增强系统性能。
Based on its national conditions, China has independently developed the BDS step by step with constant improvement.
(I) Three-Step Strategy of Development
- The first step is to construct the BDS-1 (also known as BeiDou Navigation Satellite Demonstration System). The project was started in 1994, and the system was completed and put into operation in 2000 with the launching of two Geostationary Earth Orbit (GEO) satellites. With an active-positioning scheme, the system provided users in China with positioning, timing, wide-area differential and short message communication services. The third GEO satellite was launched in 2003, which further enhanced the system's performance.
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