First, find a suitable place to park the bike. Do not let it be an obstacle.
To lock it, pull down the lever on the rear lock. The lock will indicate it is locked with a "beep" sound. Check the app to confirm it is locked properly.
To open the rear lock, scan the QR code on the lock, click "unlock" and it will open. You can now continue your ride. No other user can unlock a bike you have temporarily locked.
Please note, that the rental fee does not pause when you temporarily lock your bike. It runs from when you started your rent until you finish it.