In our army, the signal corps consists of fixed communication, field communication, communication engineering, command automation, communication observation, navigation, military mail and other units. Among them, the signal soldiers at all levels of the synthetic army are field signal soldiers, and they will also be equipped with military mail troops in wartime. Field signalmen are equipped with various radio stations, radio relays, wired communication equipment and sports communication tools. Among them, some signalmen are also equipped with communication helicopters and satellite communication earth stations.