What does ZTO Express number protection mean?

ZTO Express number protection protects the privacy of the recipient. It means that the courier company uses a hidden phone number and does not display the recipient's phone number to protect the recipient's privacy. If the mobile phone number is under protection on the express delivery, it is a protective measure of the express company to prevent the courier and recipient's mobile phone number from being leaked. It is a protective measure to prevent the other party from being harassed. This is basically how it is used now.