6.3 Contact List
Click Contact list 
in the main interface, enter into the contact list as Picture 6.4
Picture 6.4
Search contact: click 
button, enter into search function
Add contact: click 
button, enter into add contact interface.
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Click Contact list in the main interface, enter into the contact list as Picture 6.4
Search contact: click button, enter into search function
Add contact: click button, enter into add contact interface.
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