this is called dialogue title in china
you need to create a xml file and put it on your server
change two xml file content from aion client.
look at element name STR_BTITLE_SERVER_AND_TITLE_RSS ( from clinet_strings_ui.xml and client_strings_override.xml )
change their element names "body" content to your xml location on your server (these two files in L10N data.pak I remember) .
let aion client can got your xml content from your sever!
change your server id to 100 from mysql gameservers table from aionls (u may in other name) database .
Its working on Aion 5.8 .
for 7.7 I am not sure and tested .
but this is only a way you can know how to create a dialogue title (bubble title) on your character head.
below pictures is xml content you need to check.
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create your http server first