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"The US Congress has repeatedly failed to produce any evidence to support its restrictions on Huawei products", said deputy chairman Guo Ping.

The Chinese businesswoman is accused of violating US sanctions on Iran by selling USA telecom equipment to the country via a Huawei subsidiary, Skycomm Tech, whose relationship to the Chinese telecom giant was cloaked.

Guo said the USA government had "mislead the American public" regarding Huawei and "never presented evidence" regarding its allegations against the company.

"Huawei are prepared to take this legal action as a proper and last resort".

It's just one small part of a multi-pronged charm offensive that seeks to squelch USA accusations that its communications equipment helps Beijing spy on foreign powers.

Huawei Technologies Co Chief Financial Officer Meng Wanzhou arrives back at home after her court appearance in Vancouver, British Columbia, Canada, March 6, 2019.

In its USA case, Huawei is taking aim at a provision in the 2019 National Defense Authorization Act. "US Congress has simply attacked as lawmaker, prosecutor and juror at the same time, contrary to the American constitution", Song said.

The US has been lobbying its allies to block Huawei technology from their developing 5G networks.

Huawei said it hopes the US removes this section so it can work with the USA and President Donald Trump.

Huawei has about 40 per cent of the global market for network gear. Huawei is willing to address the U.S. Government's security concerns.

Huawei, based in Shenzhen, near Hong Kong, is a leading developer of 5G along with rivals Nokia Corp. of Finland and Sweden's LM Ericsson.

"In consultation with operators and vendors, we worked hard this year to see if there were ways to protect our 5G networks if high-risk vendor equipment was present anywhere in these networks".

Update 1 (9:22PM EST): Huawei is suing the USA governemnt for singling out Huawei and damaging its reputation without providing proof that the company is a threat as the U.S. congress claims and without allowing Huawei due process to reach a resolution.

Huawei executives have continued to insist on the company's independence and transparency. China has retaliated against Canada by accusing detained Canadians of stealing state secrets, while today the country revoked a Canadian canola permit, in an economic response. That followed the Canadian government's announcement Friday that the extradition proceeding for Meng would be allowed to continue.

Huawei founder Ren Zhengfei later said Ms Meng's arrest was politically motivated and "not acceptable".

Some European officials and others cite a Chinese security law that requires companies to co-operate with intelligence agencies.

In its lawsuit, Huawei said its "equipment and services are subject to advanced security procedures, and no backdoors, implants, or other intentional security vulnerabilities have been documented in any of the more than 170 countries in the world where Huawei equipment and services are used".