The United States will host multi-national naval drills called the Rim of the Pacific Exercise (RIMPAC) -- billed as the world's largest -- off Hawaii in June and July.
Although the Chinese navy has previously joined the exercises, held every two years, the latest drill comes as the country more aggressively asserts its maritime claims in Asia, prompting the US to say in March that it was "reassessing" Beijing's participation.
He was speaking after the arrival of his flagship the USS Blue Ridge in the commercial hub, just days after China denied a port call for a US aircraft carrier in its special administrative region of Hong Kong.
US Defense Secretary Ashton Carter said in April that China was still invited to the massive exercises.
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"It was really good that we were able to have the PLAN participate in the last Rim of the Pacific, and they're participating also this summer," Aucoin said.
China has just announced its own naval combat drills in the South China Sea with three vessels leaving port on Wednesday to join the exercises, according to state media.
It has also built up artificial islands on outcrops in the area.
The United States has sent ships and planes into the strategically vital waters in an attempt to counter what it has described as a threat to freedom of navigation.
Aucoin denied that the US presence in the region was raising tensions, saying the goal was to allow access to sea lanes in international waters, and urging China to cooperate to maintain peace and security.