It has also ruled out the prospect of Beijing using the pact as the basis to build a military base in the country, a nation of islands, big and small, to the southeast of Papua New Guinea.

Solomon Islands may lean less on Australia with new pact, but at what cost?

Still, officials from the US and Japan have rushed to visit and Morrison has warned that a Chinese military base in the Solomon Islands would be a “red line” for his government.

“So I would like to understand, why so inconsistent and what is your position?” Wong asked.

In her response, Payne said the ruling coalition had continued to respect the sovereignty of the Pacific Islands while noting China’s assertiveness in the region.

She referenced how countries like the Solomon Islands had switched allegiance to China from self-ruled Taiwan. She also said that it was important to be careful about how the “red line” comment was interpreted, but offered no details on why this was the case.

Instead, she pointed out that the Solomon Islands’ Prime Minister Manasseh Sogavare had reaffirmed his commitment to Canberra not to accept a Chinese base in his country.

Morrison’s mention of a “red line” has infuriated China. In late April the prime minister said a possible Chinese military installation in the Pacific nation was a “shared concern, not just Australia, this is Australia and regional governments, particularly places like Fiji and Papua New Guinea”.

02:17

China confirms signing of Solomon Islands security pact, as US warns of regional instability

China confirms signing of Solomon Islands security pact, as US warns of regional instability

He also said that working “with our partners in New Zealand and of course the United States, I share the same red line that the United States has when it comes to these issues”.

Morrison has since avoided offering details about the consequences for the Solomon Islands if the “red line” was crossed.

Beijing has said Canberra’s rhetoric about sovereignty was reflective of its obsession with “colonialist myths” and said the Morrison government was “exercising coercive diplomacy, trying hard to control the Pacific islands to maintain a so-called sphere of influence”.

Sogavare has also slammed Australia for hypocrisy, noting Canberra had not given his government prior notice when it signed up to the Aukus security pact with Britain and the US that gave it access to nuclear submarines.

Australia PM ally draws flak after thanking Chinese-Australians for ‘putting up’ with racism

Morrison’s Liberal Party and Labor have maintained a similar “tough on China” stance going into the final lap of hustings ahead of the May 21 election, seeking to underscore to voters that they are keen to push back against an increasingly assertive China.

In Friday’s debate, both Wong and Payne also reiterated the importance of a strategic relationship with the US without abandoning the rest of Asia.

Answering a question about choosing between the US and China, Wong said Australia had already made its choice through its now 70-year-old alliance with Washington.

Still, that did not mean Australia could not advance its, or the region’s, interests as it saw fit, the Labor Party’s foreign policy chief said.

Elsewhere, China-Australia tensions were on full display on Friday with the Australian defence chief Peter Dutton saying a Chinese warship with spying capabilities had been hugging the country’s coastline in what amounted to an “aggressive act”.

Chinese Foreign Ministry spokesperson Zhao Lijian said he had no information about the specific situation but added that “China always abides by international law and international practice”.

Additional reporting by Bloomberg