Meng Wanzhou, chief financial officer of Chinese telecommunications giant Huawei, is facing allegations of fraud related to the alleged violation of US sanctions on Iran, has heard a Canadian court.
Details of the allegations were revealed when a Vancouver court revoked a ban on publication.
Ms. Meng, daughter of the founder of Huawei, was arrested in the city on Saturday and faces extradition to the United States.
The court is deciding whether or not to allow the deposit.
China has demanded the release of Ms. Meng, insisting that it has not violated any law.
What happened in court?
On Friday, US prosecutors told the Supreme Court of British Columbia that Meng had used a Huawei subsidiary called Skycom to evade Iran's sanctions between 2009 and 2014.
They said he had publicly misrepresented Skycom as a separate company.
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Ms. Meng faces up to 30 years in prison in the United States if convicted of the charges, the court has heard.
Court reporters said he was not handcuffed for the hearing and wore a green overalls.
The arrest has severely tested US-China relations. The two countries were locked in trade disputes, even though a 90-day truce had been agreed on Saturday – before the news of the arrest on Wednesday came to light.
Huawei is one of the largest telecommunications equipment and services providers in the world, recently switching from Apple to become the second smartphone maker after Samsung.
Mrs. Meng's arrest was not revealed by the Canadian authorities until Wednesday, the day of her first appearance in court.
The details of the allegations were not disclosed at the time they were granted a ban on publication by a Canadian judge.
On Thursday, Canadian Prime Minister Justin Trudeau said his government was informed of the arrest a few days earlier but had no role.
"I can assure everyone that we are a country [with] an independent judiciary, "he said.