A Chinese government spokesman on Monday took issue with US claims that telecoms giant Huawei Technologies poses a threat to other countries' information security because of Chinese laws.

The comments by spokesman Zhang Yesui ahead of the annual session of China's rubber-stamp parliament followed news that Huawei executive Meng Wanzhou, who was arrested by Canada at the request of the US, is suing the Canadian government over her treatment.

Lawyers for Meng, who is staying at a property she owns in Vancouver after her release on bail, said on Sunday she was suing the Canadian government, its border agency and the national police force, alleging she was detained, searched and interrogated before she was told she was under arrest.

The US is seeking [Meng's extradition][2] to face charges she misled banks about the company's business with Iran.

The US has been lobbying its allies to shun Huawei's products on national security grounds, saying Chinese law requires the company to provide it with intelligence on its foreign clients whenever requested.

Zhang said US officials were taking China's national security law out of context and "playing up the so-called security risks" associated with Chinese companies.

The 2017 law borrows from other countries' experiences and is designed explicitly to "protect human rights and the lawful rights of individuals and organisations," he said.

"This kind of behavior is interference into economic activities by political means and is against World Trade Organization rules. It disrupts an international market order that is built on fair competition," Zhang told reporters.

"This is a typical case of double standards that is neither fair nor ethical."

Washington's accusations have been underscored by Meng's arrest on Dec 1, 2018. Huawei also faces other allegations in the US related to alleged theft of technology.

Meng, Huawei's chief financial officer, is due in court on Wednesday to set a date for the extradition proceedings to start. It could be several months or even years before her case is resolved.

Her lawsuit alleges that instead of immediately arresting her, authorities interrogated Meng "under the guise of a routine customs" examination and used the opportunity to "compel her to provide evidence and information".

Meng's arrest set off a diplomatic furor and has severely strained Canadian relations with China.

China detained former Canadian diplomat Michael Kovrig and Canadian entrepreneur Michael Spavor on Dec 10, 2018, in an apparent attempt to pressure Canada to release Meng.

A Chinese court also sentenced a Canadian to death in a sudden retrial, overturning a 15-year prison term handed down earlier. Kovrig and Spavor haven't had access to a lawyer or to their families since being arrested.

Also on Monday, Chinese Foreign Ministry spokesman Lu Kang accused Canada and the US of abusing their bilateral extradition treaty. He reiterated Beijing's demand that Washington withdraw its accusations against Meng.

China urges Canada to "immediately release Ms Meng Wanzhou and let her return to China in safety while ensuring her legitimate and justifiable rights and interests and not repeat (Canada's) mistakes," Lu said at a daily press briefing.

Lu also said China had fulfilled its obligation to access by Canadian diplomats to Kovrig and Spavor, who he said are "suspected of engaging in activities that endanger national security".

China has given no details about those alleged activities and routinely cites vague national security charges to justify restricting suspects' rights to legal counsel.