Prime Minister Jacinda Ardern expressed her government's concerns about Chinese warships in the Pacific.
Video / Mark Mitchell
The Chinese ambassador is likely to be quizzed over his country's possible military expansion in the Pacific.
The Solomon Islands has signed a policing deal with China.
And the Melanesian country's government is thought to be mulling a broader security agreement covering military issues, a Solomon Islands official told Reuters.
Australian Army soldiers talk with local citizens during a community engagement patrol through Honiara, Solomon Islands. Photo / Australia Defence Force via AP
Prime Minister Jacinda Ardern today said any Chinese military expansion in the southwest Pacific archipelago would be of concern.
Solomon Islands Prime Minister Manasseh Sogavare, left, and Chinese Premier Li Keqiang attend a signing ceremony at the Great Hall of the People in Beijing in 2019. Photo / AP
The Solomon Islands security issue is expected to be on the agenda as Foreign Minister Nanaia Mahuta meets this week with Fiji's Prime Minister Frank Bainimarama.
Ardern said she was confident New Zealand and Fiji aligned on many geopolitical affairs.
Honiara is less than 1800km from the Queensland coast.
Defence analyst Paul Buchanan said the leaked document suggested the Chinese could establish a forward operating base - a functioning, secured base used to conduct further operations.
"The Australians are freaking out about it," he said.
The leak prompted speculation the Chinese could dredge a deep-water port or upgrade an existing port to accommodate warships.
'If you have forward-deployed boats then you can intimidate people, you can go to Vanuatu, you can go to Tonga," said Buchanan, director of 36th Parallel Assessments.
"In the big picture, it's bringing hard power strategic competition into the Southwest Pacific, so that could be of concern to all peace-loving countries," Buchanan added.
He said it would also be of concern to New Zealand if China established a foothold further east, say in Fiji.
"Then basically the Chinese will have the ability to straddle the most important checkpoints in the southwest Pacific."