Meng Wanzhou, Chief Financial Officer of Huawei, a Chinese telecommunications company, is facing a fraud case over alleged US sanctions against Iran, a Canadian court said.
Details of the charges were lifted when a publication ban was lifted by a judge in Vancouver.
Ms. Meng, daughter of Huawei's founder, was arrested on Saturday in the city and has to be extradited to the US.
The court decides whether a bail is allowed or not.
China has demanded the release of Ms. Meng She has not violated any law.
What happened in court?
On Friday, the Supreme Court of British Columbia was told that Ms. Meng had used a Huawei subsidiary called Skycom to circumvent sanctions against Iran between 2009 and 201
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Ms. Meng faces up to 30 years in jail If the US has found the charges culpable, the court heard.
Court reporters said she was not handcuffed for the hearing and was wearing a green tracksuit.
A lawyer from the Canadian government said Ms. Meng was accused of "plotting to cheat several financial institutions."
He had rejected US bankers no direct connections between Huawei and SkyCom, although "SkyCom is Huawei".
The lawyer said that Ms. Meng could pose a flight risk and therefore refused the bail.
Why was the arrest important?
The arrest has continued to pressure relations between the US and China. Both countries became involved in trade disputes, although a 90-day ceasefire was agreed on Saturday – before the news of the arrest on Wednesday became known.
Huawei is one of the largest providers of telecommunications equipment and services in the world, and has recently turned to Apple to become Samsung's second-largest smartphone maker.
The arrest of Ms. Meng was announced by the Canadian authorities only on Wednesday, her first court appearance.
Details of the charges were also not disclosed when she was banned from publishing by a Canadian judge.
Canadian Foreign Minister Chrystia Freeland said Friday that China has asserted that due process is being pursued and that Ms. Meng has consular access while her case is before the courts.
"Canada is a country of the rule of law and we follow our procedures, our laws and our agreements," she told journalists during a press conference.
"In Canada, the proceedings have been and are being followed."
Ms. Freeland reiterated Prime Minister Justin Trudeau's claim that Ms. Meng's arrest had "no political involvement."
Does Huawei affect the West?
Some Western governments fear that Beijing will gain access to mobile communications and other fifth-generation (5G) communications networks through Huawei and expand its espionage capabilities, despite the company insisting that there is no state control.
It is expected that Japan will prohibit the use of products made by Huawei and ZTE because of cyber security concerns by the government, local media reported Friday. It would follow measures from New Zealand and Australia to block Huawei.
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US security adviser John Bolton said his country "for years" had great concern that Chinese companies had stolen US intellectual property, forced to carry out technology transfers and, in particular, to be used as a Chinese government target for information technology. "
" Not to respect this particular arrest, but Huawei is a company that we have been concerned about, "he said.
What does China say?
A Chinese Foreign Ministry spokesman told reporters:" Detention violates a person's human rights without stating a reason. "
" We have made solemn representations to Canada and the United States demanding that both parties promptly explain the reasons for imprisoning and immediately releasing the detainee for the person's legal rights to protect.
What are sanctions against Iran?
US President Donald Trump reinstated all US sanctions against Iran that were removed from a nuclear deal in 2015.
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Mr Trump was vehemently opposed to the agreement, which restricted Iran's controversial nuclear activities in exchange for sanctions aid.19659] The re-imposed sanctions included oil exports, shipping and banking – All key areas of the Iranian economy.
Although there are some disclaimers, US Treasury Secretary Steven Mnuchin said the US would be "aggressive" targeting any company or organization "that bypasses our sanctions."