Huawei Mate 8 - Manual (Page 104)

Call & Contacts
97
Sending messages or emails to a group
1
Open Contacts.
2
Touch Groups and select the group you want to send a message or email to.
3
Touch to send a message or touch to send an email.
Deleting a group
1
Open Contacts.
2
Touch Groups.
3
Touch and hold the group you want to delete, and then touch Delete.
4
Touch Delete.
Deleting a contact group will not remove the contacts in the group from your phone.