Globally, some 2.4 million people were traced.
Experts have characterized the move as a “psychological warfare” strategy to influence public opinion in Australia.
The Chinese firm behind the compilation of the files, Zenhua Data, is understood to have links to China’s intelligence service, the Ministry of State Security.
Serwer has also worked for the Chinese Communist Party and the People’s Liberation Army.
Information included in the disclosure suggests that the server is compiling “open-source” details such as dates of birth, addresses, marital status, and photographs.
A review of the database describes how the information received is known as Facebook, Twitter and LinkedIn, as well as others.
The report states: “In addition to personal information, he logged information on posts, likes and retweets.
“It allows for a wide variety of relationships and the target person.”
But experts noted that up to 20 percent of the information could not be obtained through an open source, meaning that it may have been collected from the dark web or via hacking.
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Tory MP Tom Tugendat, whose family data has also been accessed, had earlier sounded the alarm that he would be tracing Chinese intelligence.
He said the data leak marked a “significant change” in the country’s strategy.
Speaking to the Telegraph, Mr Tugendat said: “This is another sign that his interest in UK politics has gone from general to specific.
“It is clear that the Chinese government is trying to accelerate politics abroad.
“Many of us know, through direct targeting in a crude way, that attempts to influence Britain were common a few years ago, and this suggests that private companies in China as part of a broader know-how Is being used — an attempt at consecration.