China has made solemn representations to Australia over an Australian military plane's deliberate intrusion into China's airspace, foreign ministry spokesperson Guo Jiakun said on Thursday.

Guo made the remarks when answering a query concerning the intrusion that took place over China's Xisha Islands, which he said violated China's sovereignty and jeopardized China's national security.

"The expelling actions the Chinese side took are justified, legal, professional and restrained," said the spokesperson.

Guo said China had made solemn representations to Australia in this regard, demanding it cease its infringement and provocation and stop undermining peace and stability in the South China Sea.