The pact is being formed at the same time as concerns are growing about China's growing influence in the area known in geopolitical language as the Indo-Pacific.
"China will closely monitor the development of the situation," Zhao Lijian, a spokesman for the country's foreign ministry, said in a brief statement on Thursday.
He further believes that countries should not create pacts that oppose outside states.
- The trio seriously damages regional peace and stability by creating an arms race and at the same time damaging international proliferation efforts against nuclear power.
At the same time in France
The pact is also met with anger from France, which is now canceling a planned celebration at the embassy in Washington DC.
The celebration marked the 240th anniversary of the Battle of the Chesapeake Bay, when the French navy helped the United States win the War of Independence against the British.
The commander-in-chief of the French navy has gone to Washington to take part in the celebration, which would have taken place at the French embassy and aboard a French ship in the harbor, but he will instead return home to France, writes the New York Times.
France believes that the trio's new submarine deal violates the "spirit of cooperation" between France and Australia, which according to the plans would have resulted in twelve submarines being manufactured in France, as Australian Prime Minister Scott Morrison "fully" stated in June. behind.
The contract was worth around the equivalent of around SEK 315 billion when it was announced in 2016.