Whats this about? Tensions in the Pacific..

This is clearly sending a message.

China warships leave Sydney after surprise visit 'raises hackles'

“The ships arrived off Darling Point and other famous places in Sydney’s harbor without people knowing in advance … and with armed soldiers and sailors on the decks of the ships looking fairly aggressive.”

https://www.reuters.com/article/us-australia-china-navy/china-warships-leave-sydney-after-surprise-visit-raises-hackles-idUSKCN1T80FO