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@Mentions created/maintained via API

Is there a way to create (or maintain in my case) @mentions in Chatter API posts?  I am trying to transfer Chatter posts from one instance to another but the linked @mentions are no longer linked when the message is created via the API.  I would prefer not to alert the user being mentioned but maintaining link would be nice.

Best Answer chosen by Admin (Salesforce Developers) 
Jia HuJia Hu
@mentions is only available by Chatter Rest API, not by Soap API