Replying to a post by 
@Temstar from the "
055 Large Destroyer Thread II" here as this appears to be the more applicable forum.
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From the looks of it: 107 Zunyi sailing together with 887 Weishanhu rendezvoused with 568 Hengyang in the Coral Sea on 
February 13th, and this de facto PLAN surface action group then proceeded to sail together along Australia's eastern coastline until they arrived in the Tasman Sea on or about the
 19th, where they conducted live fire exercises.
Not so coincidentally the 
23rd China-Australia Defense Strategic Dialogue was also held in Beijing on the 
17th: the 
, while the 
 which included such "charming" verbiage as:
The men running Zhongnanhai are not stupid or purposeless. It is almost certain that this PLAN surface action group was pre-positioned in the Coral Sea by the 
13th with the aforementioned meeting in mind.
Evidently, the Central Military Commission came to the conclusion that their Australian counterparts in defense and government "didn't get the message" during the meeting on the 
17th.
Therefore, it appears the CMC came to the conclusion that it was necessary for the PLAN to demonstrate directly to the Australian populace, largely by and through their media, China's capacity for 
gunboat diplomacy.
Definitely one way for Beijing to "make the case" 
directly to the Australian populace, especially at a time when Uncle Sam appears to be retreating towards isolationism, at least relatively speaking.
Looks like some of these old cartoons might need 
updating soon . . .
View attachment 146456
Though New Zealand might be getting the message or at least a portion thereof, and 
 of 107 Zunyi and her cohorts:
Not too sure what the Australian defence establishment or their senior officials are contemplating right now, but at least 
 at this point: