“We strongly condemn such despicable moves of the UK side and have lodged stern representations with them,” the spokesperson said.
They urged the UK to “stop going further down the wrong path of undermining China-UK relations”.
Commons Speaker Sir Lindsay Hoyle and his counterpart in the House of Lords, Lord McFall, circulated the MI5 warning to MPs and peers on Tuesday.
The alert specifically identified two LinkedIn profiles set up with the names Amanda Qiu and Shirly Shen.
The BBC has contacted both for a response, although it is not clear if the women named and pictured on the networking site are the actual account holders.
Simon Whelband, a researcher for Conservative MP Neil O’Brien, told the BBC he had been contacted by one of the accounts.
After receiving the alert from Parliament, he searched his LinkedIn account and discovered a three-month-old message from a profile in the name of Shirly Shen.
The message, written in poor English, included a potential job offer.
Mr Whelband, who has reported the message to the parliamentary authorities, said he found the incident “deeply worrying”.
“It’s put me on edge a little bit, but I’m not surprised,” he said, noting that O’Brien, the MP he works for, is a vocal critic of China.
“I’ve worked around Parliament for about 10 years now so I’m kind of used to this.
“But if you were more junior, you don’t know what you’re looking for.
“You might think it’s a genuine offer that’s made to you on LinkedIn, they might accept.
“If it was written in better English and looked more credible you could be fooled into thinking it was genuine.”
