The Chinese ambassador to the UK called Britain's decision to ban Huawei's telecommunications giant from its 5G network "disappointing and wrong."
The British government has ordered companies to eliminate Huawei's equipment from the system by 2027.
Follows the sanctions imposed by the United States, according to which the Chinese company poses a threat to national security, which Huawei denies.
US President Trump welcomed the UK decision, calling Huawei "unsafe".
"We convinced many countries, many countries - and I did most of it myself - not to use Huawei because we think it's an unsafe security risk, it's a big security risk," he said.
Huawei has repeatedly said that it would not harm any country.
In response to the ban, Chinese ambassador Liu Xiaoming wondered if the UK could provide a "fair" commercial environment for foreign companies.
"Disappointing and wrong UK decision on Huawei," he tweeted.
"It has become questionable whether the UK can provide an open, fair and non-discriminatory business environment for companies from other countries."
Huawei's UK communications director Ed Brewster told BBC Newsnight that the ban was announced "because of US pressure."
"I think it's clear that it's not about security, it's about trade. It's about a US campaign focused on attacking our business and attacking technology and that's because the United States is behind technology," he said. He said.
"Today's decision is motivated so much by U.S. trade and trade policy, by US concerns about falling behind in technology. We are long-term ... escalation of trade disputes from the United States on how it wants to keep technological leadership. "
Mr. Brewster also moved to move society away from the perception that it is an arm of the Chinese state, adding: "This is the perception but it is not correct. We are a private technology company. The trust we have built around the world is with our customers (and) telecommunications networks.
"We don't work for governments, we work for telecommunications networks."
What does the ban mean?
UK mobile phone providers will not be able to purchase new Huawei 5G equipment after December 31, and by 2027 they will also have to remove all the Chinese company's 5G kits from their networks.
The decision came after the United Kingdom's National Cyber Security Center (NCSC) warned that highly restrictive U.S. sanctions prevented the security of Huawei equipment.
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Announcing the ban in the House of Commons on Tuesday, digital secretary Oliver Dowden said it was not an easy decision, but the right one for the UK telecommunications networks, national security and the UK economy.
He said the move would delay the country's 5G launch for a year and that the cumulative cost, if combined with the previous restrictions announced against Huawei, would be up to £ 2 billion.
5G promises faster internet speeds and the ability to support multiple wireless devices, which should be an advantage for everything from mobile games to higher quality video streams. 5G connections are already available in dozens of UK cities, but coverage may be poor.
The UK last reviewed Huawei's role in its telecommunications infrastructure in January, when it was decided to let the company remain a supplier but introduced a limit to its market share.
But in May, the U.S. introduced new sanctions designed to end Huawei's ability to manufacture its own chips.
The Trump administration says that Huawei provides a gateway for China to spy on and potentially attack countries that use its equipment, suggesting that the company strongly refuses.
The U.S. has asked members of the Five Eyes alliance - which also includes the UK, Canada, Australia and New Zealand - to avoid the Huawei kit.
