In fresh criticism of Australia's 5G policy,Cheng Jingye says the ban is"politically motivated"and discriminatory.
A conservative British politician has echoed an Australian warning about Chinese technology giant Huawei.
A planned visit to the UK by the Australian Parliament's powerful intelligence and security committee has been abruptly cancelled.
Ambassador Liu Xiaoming told British television the string of ex-cabinet ministers seeking an Australia-style Huawei ban was a"witch-hunt".
British leader Boris Johnson faces a rebellion within his own party after the Chinese telco was allowed to be part of the UK's 5G network rollout.
The UK's foreign secretary has been told his government was"flat-out wrong"to allow Huawei into its 5G network in a private meeting with Australian MPs.
Dominic Raab also says his nation hopes to take a lead in tackling climate change and will encourage others to follow its example.
Johnson disappointed his Five Eyes partners by allowing the Chinese company to continue supplying his country's 5G networks,albeit with a limit.
The man who used to run signals intelligence in Australia says he could not make our 5G systems safe against a company whose government has been hacking Australia for a decade.
US Secretary of State Mike Pompeo vowed never to send intelligence through a network America couldn't trust,declaring China the central threat of our time.
The UK had “doubled down on a flawed and outdated cybersecurity model” in order to “convince themselves” they can cope with risks from Beijing,wrote the ASD figure.