This is the best summary I could come up with:
The Sunday Times reported the researcher had links to security minister Tom Tugendhat and foreign affairs committee chairwoman Alicia Kearns, among others.
Conservative MP Alicia Kearns said she was aware of the paper's report but declined to comment, adding: "While I recognise the public interest, we all have a duty to ensure any work of the authorities is not jeopardised."
Tensions have been increasing over both espionage and wider security threats in recent years - but the last few months has seen attempts by both Washington and London to stabilise relations with China.
The UK's Foreign Secretary James Cleverly visited Beijing less than two weeks ago and told the BBC it would not be "credible" to disengage.
Reacting to the arrests, Conservative MP Iain Duncan Smith said it was "time for us to recognise the deepening threat that the CCP (Chinese Communist Party) under (President) Xi now pose".
MI5 and the wider intelligence community have long complained that the old Official Secrets Act was inadequate in dealing with hostile state activity.
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