Route number is 21. Remember it—the number stays the same everywhere: on the stop display, in apps, on the vehicle itself. Look for 21 specifically. If you're not sure you found the right stop, just ask someone nearby: 'Does bus 21 stop here?'

This route serves the Nanjing (China) region. In larger metro areas, routes can pass through several districts or towns. To know for sure if it works for you, pull up the route map and check the key stops and direction.