What's on the label? Only driver will know

Cainiao, the logistics firm backed by e-commerce giant Alibaba, has said it aims to roll out "invisible waybills" on parcels nationwide by the end of this year to help prevent personal data theft.

The company's system, now being tested in five northwestern provinces, encrypts a recipient's name, address and phone number on a parcel and only allows express delivery drivers to access the information through a specially designed app.

"China has the largest logistics industry in the world, but the personal information placed on waybills has caught the eye of criminals," said Bao Ying, a Cainiao spokeswoman. "To better protect the privacy and interests of our customers, we came up with invisible waybills."