Contact info placeholder added

documentation/source/definitions.rst

 .. |main_project_name| replace:: OpenHarmony
 .. |main_project_name_bold| replace:: **openharmony**
 .. |main_project_tag| replace:: openharmony
-
+.. |contact_info| replace:: contact@openharmony.io

documentation/source/readme/Code of Conduct.rst

@@ -5,7 +5,7 @@ Code of Conduct
 
 The OpenHarmony community complies with the code of conduct specified in `Contributor Covenant <https://www.contributor-covenant.org/>`_. of the open source community. For details, see https://www.contributor-covenant.org/version/1/4/code-of-conduct/
 
-To report insults, harassment, or other unacceptable behavior, you can contact the OpenHarmony technical committee at contact@openharmony.io.
+To report insults, harassment, or other unacceptable behavior, you can contact the OpenHarmony technical committee at |contact_info|.
 
 Our Pledge
 **********
@@ -58,7 +58,7 @@ Representation of a project may be further defined and clarified by project main
 Implementation
 **************
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at contact@openharmony.io.
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at |contact_info|.
 
 All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
 

documentation/source/readme/Communication in Community.rst

@@ -23,7 +23,7 @@ If you have never subscribed to a mail list before, follow the steps below:
 ======================= ============================= ================================================================================================
 Email Address           Introduction                  Description
 ======================= ============================= ================================================================================================
-contact@openharmony.io  Public Mailbox                Public mailbox of the OpenHarmony community. 
+|contact_info|  Public Mailbox                Public mailbox of the OpenHarmony community. 
                                                       You can send emails to this mailbox to sign the Contributor License Agreement (CLA).
 dev@openharmony.io      Development mail list         OpenHarmony community development discussion group. 
                                                       Any topics related to community development  can be discussed here. Any one can `subscribe <https://lists.openatom.io/postorius/lists/dev.openharmony.io/>`_ to it.