BeiDou is China's satellite navigation system, similar to the Global Positioning System (GPS) used in many countries. It provides accurate positioning, navigation, and timing services to users around the world. The system consists of a network of satellites that orbit the Earth, allowing devices to determine their location with high precision. Launched in phases, BeiDou has become fully operational, offering services not only in China but also across Asia and beyond. It supports various applications, including transportation, agriculture, and disaster relief, making it an essential tool for modern technology and enhancing global connectivity.