On PackageRadar website «Package has left the office for delivery» status means these statuses of ZTO Express:
Tracking package of ZTO Express
With the use of our tracking form you can easily check the status of your package. Also if you want to tracking ZTO Express and get your package location updates to your e-mail, you can Register on our website.
ZTO Express — is not the only postal service that you can track at PackageRadar. See full list of postal services available.