Just add his QQ number directly,

Unable to view e-mail address.

At the same time, if the mailbox usage is large, it is recommended to install professional mobile QQ mailbox client 4.0, which can be downloaded through browser or app search, install opening software-add mailbox and select corresponding service provider-enter account number and password for binding, support imap/pop3/exchange binding and multi-account management, and have the functions of simple setting, instant reminder of new mail, synchronization of address book, integration of drift bottle to make mailbox more interesting, file transfer station, calendar adding itinerary reminder and so on.

I hope it helps you!